I need help with my payment
Hello I'm a student who used AT&T service in USA as an exchange student. After graduating the high school, I came back to my hometown and I forgot to cancel the payment before leaving USA. I tried to access and cancel the payment in Korea but it is not possible because I can't get number code for log in( I guess it's because I'm in South Korea Right now.) Is there any way I can cancel my payment even I'm in Korea right now? I know my user ID and password.
There is other question about my payment here. I'm going back to USA for university this September. If I let my payment just working like this and not cancel it this for vacation , Is it possible to use service right after i arrive in USA with same SIM card that I used in USA? I really need Help so much. I'll wait for the response. Thank you!!