DayzMeDangerously

I got banned from a dayz server, so I constantly joined the server so the chat messages would spam, so now he unbanned me so I cant spam anymore, but he did something to my account/cd key -- everytime I join the server after about 30 seconds of being able to play I automatically disconnect, and when I press escape I just get a blackscreen and I have to close the client. What exactly did he do to me and how do I get rid of it?

I got banned by an abusing admin, cause I kill him legit. Just answer my question.

Me. Its an Epoch server where I spend weeks on building my base.