No product and service agreement failure

My mother bought me a laptop at Dion Wired for my birthday and we also purchased a memory upgrade. The memory upgrade was done in store. After the memory upgrade the PC started giving blue screen errors so eventually we took it back to the store. We were told it will be send to Incredible Solutions and it should take about three weeks and they will be in contact. Now, months later, we have still not heard anything from anyone. Therefore, without further adieu, if we don't have our money returned by next week this time I will open a case at SAPS and/or get legal assistance. I will also take to social media to precaution other buyers.