Cannot login my prepaid account
Last year, I have used prepaid service. and I have come back to China now. So I want to cancel my prepaid account.
But now I cannot log in my account, and the system says that the account has been disconnected and let me contact Customer Service.
Because I'm not in USA now, I don't know how to do that. Can someone tell me how to send message to AT&T so that I can log in to so
that I can cancel my account?