First off, its not an account ban. Its only a server ban from the servers that that particular admin/clan owns. You can't get EA or DICE to resolve this, as they paid for the server so they can chose to ban you from it or not.
Second of all, i see your username is @rename234444 meaning it was renamed by EA for being offensive, so they have banned your EA guid, meaning changing your username won't remove the ban. Move on and join a different server.
