Bad customer service, inconvenience&poor managemen

I had to exchange but lost the slip which meant that I was forced to exchange these items or receive a gift card. The items were totaled to R427,97. Due to the amount of totaling over R300 (gift cards do not exceed this amount), I was then compelled to take an item , in order to receive my gift card. This was suggested by Vundi. I then had the item, and gift card which I was planning on utilizing. Vundi then escorted me to the security guard,and told her I'd exchange the item yet again and she seemed to understand that. I then got the clothes I wanted and went to go pay for them at the till. I was assisted by Ncamisile Nkomo, who then asked me why I did not have a slip for my item and a sticker on my plastic bag for exchange. I told her Vundi said it would not be a problem. She then told me it was, and sped to call the security guard. Ms Nkomo asked the guard whether she had seen me before and the guard denied ever seeing and then further insinuated that I am a *****. Mind you, there are customers behind me in the line watching this. I then got a mouthful of insults from Ms Nkomo,who also threatened me. Vundi nor did the manager immediate assistance. The attitude was disgusting.