Hello, I got banned for a security cheat. If it's possible to be unbanned, that would be nice, thank you.

Hello, I stopped playing on en2 five months ago and now when I try to connect, I am banned for security cheat. I can't remember my username, but I only have my first name and not my account name. If it's possible to unban me, it would be kind of you.

why i got banned from server for security ban ??????????