you had a big brackets problem, i fixed it.

here is your fixed code (Bracket fix only)

Btw, you need a on join event, for the op voice and owner :p

how would you voice the addvoice without it?

on *:load: /guser owner $$?="Owners NickName:" 3 | //echo -a 7Thank Your for Using 12G13AoUsTiS7 Bot Commands 

on *:text:!voice*:#: {
  if ($2 == $null) { /notice $nick Incorrect Syntax: !voice <nick> }
  if ($level($address($nick,3)) == owner) { /mode $chan +v $2  | /notice $2 $nick Voiced You In $chan | | /set %lastcmd $nick Voiced $2 }
  if ($level($address($nick,3)) == op) { /mode $chan +v $2 | /set %lastcmd $nick Voiced $2 }
  if ($level($address($nick,3)) == voice) { /mode $chan +v $2 | /set %lastcmd $nick Voiced $2 }
  else { /notice $nick You Dont Have Enough Access To Perform This Command
  }
}
on *:text:!devoice*:#: {
  if ($2 == $null) { /notice $nick Incorrect Syntax: !devoice <nick> }
  if ($level($address($nick,3)) == owner) { /mode $chan -v $2 | /notice $2 $nick Devoiced You In $chan |  | /set %lastcmd $nick Devoiced $2  }
  if ($level($address($nick,3)) == op) { /mode $chan -v $2 | /set %lastcmd $nick Devoiced $2  }
  if ($level($address($nick,3)) == voice) { /mode $chan -v $2 | /set %lastcmd $nick Devoiced $2  }
  else { /notice $nick You Dont Have Enough Access To Perform This Command
  }
}
on *:text:!op*:#: {
  if ($2 == $null) { /notice $nick Incorrect Syntax: !op <nick> }
  if ($level($address($nick,3)) == owner) { /mode $chan +o $2 | /notice $2 $nick Opped You In $chan | /set %lastcmd $nick Opped $2   }
  if ($level($address($nick,3)) == op) { /mode $chan +o $2 | /set %lastcmd $nick Opped $2   }
  else { /notice $nick You Dont Have Enough Access To Perform This Command
  }   
}
on *:text:!deop*:#: {
  if ($2 == $null) { /notice $nick Incorrect Syntax: !deop <nick> }
  if ($level($address($nick,3)) == owner) { /mode $chan -o $2 | /notice $2 $nick Deopped You In $chan |   | /set %lastcmd $nick DeOpped $2  }
  if ($level($address($nick,3)) == op) { /mode $chan -o $2  | /set %lastcmd $nick DeOpped $2  }
  else { /notice $nick You Dont Have Enough Access To Perform This Command
  } 
}
on *:text:!ban*:#: {
  if ($2 == $null) { /notice $nick Incorrect Syntax: !ban <nick> <Reason> }
  if ($level($address($nick,3)) == owner) { /mode $chan +b $2 | /kick $chan $2 ( $+ $nick $+ ) $3- | /set %lastcmd $nick Ban $2 with the reason: $3-  }
  if ($level($address($nick,3)) == op) { /mode $chan +b $2 | /kick $chan $2 $3- | /set %lastcmd $nick Ban $2 with the reason: $3-  }
  else { /notice $nick You Dont Have Enough Access To Perform This Command
  } 
}
on *:text:!unban*:#: {
  if ($2 == $null) { /notice $nick Incorrect Syntax: !unban <nick> }
  if ($level($address($nick,3)) == owner) { /mode $chan -b $2  | /set %lastcmd $nick UnBanned $2  }
  if ($level($address($nick,3)) == op) { /mode $chan -b $2  | /set %lastcmd $nick UnBanned $2  }
  else { /notice $nick You Dont Have Enough Access To Perform This Command
  }
} 
on *:text:!kick*:#: {
  if ($2 == $null) { /notice $nick Incorrect Syntax: !kick <nick> <Reason> }
  if ($level($address($nick,3)) == owner) {  /kick $chan $2 ( $+ $nick $+ ) $3- | /set %lastcmd $nick kicked $2 with the reason: $3-  }
  if ($level($address($nick,3)) == op) { /mode $chan +b $2 | /kick $chan $2 $3- | /set %lastcmd $nick kicked $2 with the reason: $3-  }
  else { /notice $nick You Dont Have Enough Access To Perform This Command
  }
}
on *:text:!lastcommand*:#:  /msg $chan 7 $+ %lastcmd

on *:text:!addop*:#: {
  if ($2 == $null) { /notice $nick Incorrect Syntax: !addop <nick> }
  if ($level($address($nick,3)) == owner) { /guser op $2 3  | /set %lastcmd $nick added $2 as an OP  }
  else { /notice $nick You Dont Have Enough Access To Perform This Command
  }
}
on *:text:!delop*:#: {
  if ($2 == $null) { /notice $nick Incorrect Syntax: !delop <nick> }
  if ($level($address($nick,3)) == owner) { /ruser op $2 3  | /set %lastcmd $nick removed $2 from OP  }
  else { /notice $nick You Dont Have Enough Access To Perform This Command
  }
}
on *:text:!addvoice*:#: {
  if ($2 == $null) { /notice $nick Incorrect Syntax: !addvoice <nick> }
  if ($level($address($nick,3)) == owner) { /guser voice $2 3  | /set %lastcmd $nick added $2 as a Voice  }
  else { /notice $nick You Dont Have Enough Access To Perform This Command
  }
}
on *:text:!delvoice*:#: {
  if ($2 == $null) { /notice $nick Incorrect Syntax: !delvoice <nick> }
  if ($level($address($nick,3)) == owner) { /ruser voice $2 3  | /set %lastcmd $nick removed $2 from Voice  }
  else { /notice $nick You Dont Have Enough Access To Perform This Command
  }
}
on *:text:!say*:#: {
  if ($2 == $null) { /notice $nick Incorrect Syntax: !say <message> }
  if ($level($address($nick,3)) == owner) { /msg $chan $2-   }
  else { /notice $nick You Dont Have Enough Access To Perform This Command
  }
}
on *:text:!act*:#: {
  if ($2 == $null) { /notice $nick Incorrect Syntax: !act <message> }
  if ($level($address($nick,3)) == owner) { /describe $chan $2-   }
  else { /notice $nick You Dont Have Enough Access To Perform This Command
  }
}
on *:text:!topic*:#: {
  if ($2 == $null) { /notice $nick Incorrect Syntax: !topic <Topic> }
  if ($level($address($nick,3)) == owner) { /topic $chan $2-   }
  else { /notice $nick You Dont Have Enough Access To Perform This Command
  }
}
on *:text:!lines:#: {
  var %i = $script(0), %lines = 0
  while (%i) {
    inc %lines $lines($script(%i))
    dec %i
  }
  msg # 7There Are:12 $script(0) 7scripts with:12 $genuinenumber(%lines) 7lines making me up!  | halt
}

on *:text:!level*:#: {
  if ($level($address($2,3)) == owner) { /msg $chan 12 $+ $2 7is the bot's owner! }
  if ($level($address($2,3)) == op) { /msg $chan 12 $+ $2 7is an:12 OP }
  if ($level($address($2,3)) == voice) { /msg $chan 12 $+ $2 7is a:12 Voice }
}