Cross Trainer sells defective items

I recently purchase a garment from the Cross Trainer store in Kimberley on the 19 July 2018. I examined the garment and found it was defective. I returned the next day the stored offered to call other stores and order me a replacement all the stores contacted stated the size medium items was defective and not suitable for sales. I was told by the store manager Rathale he will get back to me as he has to call and find a solution to the problem. Today the 23 July 2018 I was told to call head office myself to sort out this matter head office refered me to the area manager who was rude and dismissive saying he has no control and I should speak to the manager Gilbert at head office. I then again proceed to call Gilbert and explained the matter to him informing in that I would like a refund on my purchase as I was no reluctant to after been made aware of factory faults on this particular garment I explained to him was refered to the CPA in regards to the return of defective goods. He was rude and told me he was last entry point and he will not authorise a refund for me. I have been told call Gilbert the manager at head office, call, Raymond the area manager, I have been sent back to the store twice already still the refused to refund me on the defective garment. What is my redress now as everyone is not assisting me.