If only one account has ever existed on the Xbox, and Father, Mother, Brother, or Sister hasn't snuck into your game system to create an account on it, then like I said, I would contact Microsoft and discuss your account with them, and preferably have the codes from the game available or some form of receipt so they can track back and see what is happening on the game. I don't think EA has anything to do with adding or removing things from Microsoft Xbox accounts, that should all be handled inhouse by Microsoft.
