ban appeal

I was no longer playing minecraft, had no computer, now buy my computer and entered his server I can see that my account is banned by kill aura? hack? I have never used things like, appealed my account and changed the name antler .. but today I changed my password and update my minecraft data ...

I tried to be Un-banned with https://appeals.ccgn.co/ but appear this: Hello Mati_4000. Your ban appeal has been unsuccessful. Your appeal has been declined and can not be submitted again. When I tried to enter to the server it says it can be an error! I change my name to: iMati_PvP Please...