Poor quality and a superior beds price

I purchased a bed at a reputable retailer in late 2019. My needs for a bed was comfort and extra weight support. The sales person was grate at selling me their most expensive beg on shopfloor. The sales description matched my wishlist and I took the bed on 6 months terms at R12 or R13k. Low and behold 6 months later the matress started collapsing in the center. Keep in mind that my body weight is 109 kg and my wife 95kg, but the bed is "supposed" to be 140kg weight capacity. I then had to fight to get a exchange from the supplier due to covid . I eventually managed to get a call from some ops/area manager from the supplier, whom apologised and make things happen. My was matress exchanged was approved. The day of the delivery came and I inspected the matress when I got home and to my surprise, the stitching was all faulty. I the contacted the store the next morning , and sent them pictures and they forwarded it to the supplier. I then got a call from the same manager, whom again apologised and offered to send me 2 pillows for the inconvenience. The exchange was the done a day later, and dispite the outer stitching being faulty again, I notified the sales person, but decided to let it be as I was tired of all the fuss. Fast forward to 2020. My matress hurts both our backs and it's difficult to get a good night's sleep.

I recently bought a R4800 bed from one of the independent retailers and believe me that bed offers a more comfy experience. So I contacted the store and they contacted the supplier, whom in return said that I should pay R1450 to have the mattress exchanged. I feel that this is so unfair. It seems I will have to pay this amount of money, but I will ensure that I advise on all social media platforms, about my experience.