Bad customer service at Pep store in Jabulani mall branch 6218 clothing and customer care

I was in Pep store to use vouchers that has an amount of R150 I try to purchase for R30 and the was a change . On that voucher is written that any change that is above R10 store will issue a new voucher but they started playing hide and seek, forcing me to buy with all the credit both store assistance and manager in branch 6218 . I call customer care 4times using my airtime and every time I made a call I had to start from the beginning to explain all the details ,they will ask me to hand over a phone to a manager that take long time when he is been call on the till point to speak to them on my phone with my airtime . Fast forward matter was not being resolved customer care did even want to take my contact number to be call back as a customer . This is a worse sevirce I have ever come across.