Hi everyone

[warranty45]

I really liked this server.
but now it says I'm banned and I don't understand why.

[Spartan]

Heres some questions to ask yourself. 

Did you grief?
Did you draw vulgary drawings?
Did you swear excessively?
Were you being disrespectful to others?

If yes to any of those (just to name a few), then that's why you were banned. If no to all, then it could be a bug.