AT&T charge me twice, 2 weeks later still don't refund!!!

On 11/16, my phone suddently suspended, I made an online payment immediately.  Later I found out my girlfriend who share the same family plan called few days ago, and made payment over the phone.  I called AT&T on 11/17, the representitive said the payment was handled over the phone applied to different account, and explain that AT&T is like a bank, anyone can deposit money, but how could that possible using AT&T phone call in to make payment, and the payment goes to different account?  When I go to Chase Bank, swipe the bank card, they didn't deposit my money to different account.  Why AT&T has such non-sense excuse?

After I talked to the representitive, she told me AT&T is going to refund the money, send me an email confirmation, but 2 weeks later, I still haven't got the refund.  Here is the content of the email.

This is to confirm the following payment has
been refunded:

Refund Amount: $187.10

Refund Date: 11/17/2012



- Refunds are processed using the original payment method.