Damaged Goods

I purchased a pair of Puma Takkies for my son from the Store in Forrest Hill Centurion. 29 Nov 2017. In February (not even 3 months later) he noticed that the stitching was coming out on the inside of the one shoe. I took it back to the store with the original box (however I lost the slip) and was told by the manager that even if I give him that date he will not be able to trace the purchase (This is the first time I heard of this as almost every other retail store is able to trace your purchase). He further stated that because it was damaged he would need to send pictures to the quality manager for evaluation. HOW CAN AN ASSESSMENT BE MADE BY LOOKING AT A PHOTO. Never the less he took the photo and returned the takkies to us stating that he will contact is with feedback as soon as he hears from the evaluations department. Last week, 2 weeks later, when we went back to check he had still not heard back from anyone. My issue is that I spent R999 on a pair of takkies that has only been worn a few times and cannot be exchanged. Nobody spend that much to only wear shoes for 3 months and then throw them away.