Terrible customer service on poor quality products

I was gifted a pair of shorts from Cape Union Mart in Dec for my Birthday. After 1 wear the stitching unravelled all across the seams of the shorts and they started falling apart. I returned the item to Cape Union Mart Northgate as its a defective product, only to be told they will not replace or exchange the item and will send away for repair as I don't have receipt!!! Repair takes 4 to 6 weeks!! I called their head office only to to be told the same but was assurred by the brand manager that they will come back to me in 48 hours. Its now 1 week later, I call their customer care line and nobody knows anything about the repair and I must contact the store?????? Any other reputable brand would have exchanged the shorts for me or credited me and apologised for the inconvenience