Problem with changing plan
I was in 60$/month plan last month and I wanted to change to 45$/month so I paid 45 dollars today at one of stores. Now I'm in 45$/month plan but I got massage from AT&T and it said the plan didn't renew due to my account balance. I called the number and it said I have 0 dollar on my account now. However I paid 45$ today! I CANNOT use my mobile data AT ALL!
When I changed into 45$/month plan on call, it said "your account balance is 45$"before I changed my plan and it said "your new balance is 0$" after I changed.
What's happened with my account? And what should I do?