how can find who banned me ?
It doesn't matter who banned you.
Xal0lex, who has answered you, is part of the staff, and the rest of the members including theymos will surely see your thread being in Meta.
In the unlikely event that you had been banned unfairly they would realize and resolve the situation, but it seems to me that you are another of the countless cheaters we have around here that when staff act against them, they play the role of innocent victim.