Edgars de*****ed my account - So called system issues.

On the 2nd December I went to Edgars Clearwater mall and purchased a pair of guess jeans for 899.00 which took my balance on my account to R6446.71. On the 4th December I proceeded to return the Jeans of 899 which should have been Credited to my account and brought my balance to R5547.71. At the same time I proceeded to buy a different pair of jeans or the amount of R249.00 which should have left my balance at 5796.71. After all the transactions were done, I checked my receipt and my balance ended up being more than my initial balance when I first bought the Guess jeans and therefore it seems as though another debit of 899.00 had been taken from my account. So from 6446.71 and after returning the jeans my account balance was more ... R6696.71.... I need this sorted out at soon as possible. The same day that the transactions were done, I supposedly spoke to the manager Kgotso from Edgars Clearwater and he explained that my account would be rectified by today as this was due to system issues. Kgotso then proceeded to give me his cell number so I could resolve the issue but all of a sudden the number doesn't exist. WHAT DO I DO TO GET THIS SORED OUT. PLEASE HELP! If I hadn't compared my two receipts I would never have known!!!!