You clearly used some hack.I only did remember to i banned you but didnt remember reason,i think to it was speedhack,fly hack or weapon hack.
When i come back from school (18:45) i will unban you.
I am suggestion you to uninstall your installed cheats / modifications becuse next time you will not get that lucky.
I am also sure to you was using hacks becuse you stated above that to some hacker did break into your profile what is not possible if you do not share account.
Admins can lock.