Bad service

On Saturday 23 July I went to PEP store @ Randburg mall, I asked for a refund on hair pieces I bought at the other PEP branch and I was told that I can not the products can't be refuded because I didn't buy them from Randburg, I refused to leave cause Iknwo my rights as a consumer, then store manager was called, she said I have to go to North Gate , then I explained to her that I know what she is telling me it's not true and I need the refund as Northgate was too far from where I stay, and explained to her the reason why I return the hair piece was because my hair dresser said it was wrong hairpiece for braids I wanted my daughter to plait, She then asked me why there are x4 hairpieces while the receipt has x3 , I tried to explain to her that the extra hairpiece was from previous sales and I took it with the other x3 which I bought and put them in the same plastic bag hence it's there, she was just rude and start accusing that I might have not paid for that hair piece that's why it's in the plastic bag. I tried to remain calm and she was rude, loud and gave me nasty looks while talking to me, she raised her voice to a point where other customers' attention focused on . She eventually told a staff member to give me refund still in a rude manner, I didn't even get any apology for such horrible treatment. I've never felt so humiliated like that, worst by someone who should know how to treat customers. I had to spend about 50minutes on something which was supposed to take less than 10 minutes. When I asked her to give me her name, she blatantly refused and gave me another nasty look from bottom up and walked away. I asked x2 of your staff members to give me her name, and they said they cannot give me her name. I don't think any customer deserves treatment I received from PEP store manager, I have never encounter such rudeness from someone who should provide good service to customers, worst a store manager, who is supposed to be exemplary to junior staff.