Unauthorised purchase on my account

On 2 July 2014 I received an sms notification of R850 purchase on my account in Rustenburg. I immediately called the store and they described the person who used my card and I called that person. The goods were returned. Three transections of R850 were processed firstly it was R850 return and R850 purchase and then again R850 return. My balance was R1063. 60 before the purchase of R850.00. The end of July balance was R139. In August the balance was R1869.91. I made arrangements of debit order to pay Queenspark on monthly. I went to queenspark stores and made phone calls requesting that my account be rectified. I spoke to several people whom I regard as *********** as they failed to resolved the problem. I spoke to Chanay De Klerk, Sherra Johnton, Sinron Charnia, Randy David and Alicia Raffer to name the few but none of them assisted me to resolve this problem. They never even bother to call or make follow up as they will always say the call my be recorded for quality purpose Im wondering what quality they are talking about. On the 10th March 2015 I went again to Rustenburg Queenspark store to check my balance and it was R811.71. To date I've paid R1320.00 and still owe R811.71