1. The rule of the server is "First person to the cannon gets it the entire round, and does not have to share."
2. You were warned once to buzz off. Stealing cannons is a banworthy offense on our server. You do not have "Rights" to a cannon and you cannot force anyone to share.
3. A temp ban is a one hour ban and cannot be reverse. You can join again when the hour is up. When you do join, I recommend you follow the rules. The next time you are seen stealing anyone's cannon you will be banned for far longer.
For future reference for yourself. On maps where cannons are static, the first person to the cannon gets it the entire round whether you like it or not. On maps where the cannons are spawned, the officer who brings the cannon is the only person who gets to shoot it unless he has given permission to someone else, abandons the cannon, or dies.