Reverse charges to my debit cards for go phone minutes

How can I reverse or cancel charges to my debit master card account for go phone prepaid minutes, that were charged by mistake? I tried to purchase $60.00 of prepaid go phone minutes on the at&t web site, but when I tried to confirm the transaction I would get a message, sasaying " web site is unaunavailable please try again later". I tried again later 4 times with the same results. On the fifth try I got a message saying " transaction denied contact you bank". When I checked my bank account I found four charges for $60.00 each, and my account was overdrawn. I tried to get on live chat, but found a endless loop back to log in. I tried for hours to get through the customer service 1 800 numbers, but never could get a person to help or anything close to healing resolve this issue on the automotive system.<br><br>The bank said to contact the gender to reverse the charges, but I am finding that impossible.<br><br>Can any one offer some advice, I would be very grateful.<br><br>Thank you.<br>