Disgusting service which affected my credit score!

I Placed an order online but 2 of the same amounts were taken from my avail credit, I called the Customer Services to query this and was told that she suspected ***** as someone placed an order on my account in Tygervalley Mr price (I HAVE NOT BEEN THERE IN AGES), the adviser then told me to go to one of the nearest Mr P store asap to have my account blocked, however AT THE END of the call she then realized this was not ***** as I had placed an order online and the supplier then got the items from the Tygervalley store to have delivered (BARE IN MIND MY MONTHLY PAYMENT DUE WAS AROUND THE CORNER AND I ALWAYS MAKE CASH PAYMENTS IN THE STORE). The adviser told me the duplicate funds taken will reflect in 24 hours. A few days later I went to make a payment only to be told my account was blocked and I needed to wait whilst they call customer services, I did not have the time to wait, I called again and was told to go to the store which I refused as I was ****ED OF WAITING, they told me they reactivated my account and I can make payments, I went to the store, GUESS WHAT?? MY ACCOUNT IS STILL BLOCKED. My credit score is now messed up and I just want PAY MY ACCOUNT AND CLOSE IT. ****ED!!!!