I have a problem: For my holiday in the US I got a prepaid SIM card from AT&T. In the store I explicitly said I wanted it for only one month and the saleswoman explicitly said they won't charge me anything after that. Well, now I did get charged another month, because they apparently forgot to cancel autopay. Following the homepage, I wanted to login into my account, but I need to enter a 4 digit PIN that I get via SMS. But I don't get any carrier here in Germany on the AT&T SIM card, so I can't receive any SMS.
What can I do now? I cannot find a contact email anywhere, for costumer chat I would need a login. They have my email, but if they ever sent one, it must have gotten into my spam filter (I did not think I'd need anything from AT&T).
My credit card provider can neither block AT&T from charging me, nor reverse the charge.
Can you guys help me find a way to cancel my contract? If possible I want to avoid paying the money to call the hotline from Germany.