First, you can only change your name once. If you allowed somebody else into your copy of the game, it is your responsibility I'm afraid, and SC are unlikely to allow another name change for that reason.
Second "false identity" is not a crime at all. It is only a crime to use snother identity with the intention of committing faud or other illegal acts.
Your only chance is if somebody else has changed your name to one which is now deemed unacceptable by SC



