[2019] Actual curious question on server bans?

SO was playing on a server just a bit ago and was in the middle of a fight and boop was banned from the server. Had one accidental TK and hadnt typed in chat, and didn't see a vote kick. Is there any other reasons for server bans besides the official rules? Or are there any official servers? I cant actually review what I did wrong so I am kinda in the dark here.

Is there anyway to get ahold of Jax to ask him to fix the ban?

my name in game was ColdMiller.