Store copy is for the store

I went to the store in Birch acres to return the shoe that were bought for me in Jan as a present which is now damaged. The team leader wanted a receipt which I didn't have as I worn the shoes several times I. Jan and Feb so I told him that the receipt and I remember cleaning my room and throwing it away. He called Thulani (the Manager) cos I exchange the size in the store for a different size. Obviously there is a store copy but the manager said the store copy is for the store not for the customer. This is so disappointing because the shoes was not even two months old when they show signs of damages. I asked them to atleast take the shoes for quality assurance because the price on the shoes suggested that it is a good quality but I was nor even entertained. I also sent an email to truthworths but still 6 days later I didn't get any response