Defective Bicycle NEEDS TO BE REFUNDED

I have bought a bicycle from the Midrand branch almost a month ago for my kid. He used the bicycle and the next day after purchase the pedal broke. Day after that the other pedal broke. Then the simplex for the gears broke within a week of purchase. We paid R1300 for the bicycle and for it too last a week is totally ridiculous. I took the bicycle back and the Midrand Vorna Valley branch advised that the bicycle Was tampered with my son had fallen off the bike. This WSt really not the case so I clogged a call with their head q. They now sent me a message saying that they have contacted their supplier ( on a second hand bicycle lol) and it will take 15 days or more for feedback. So I paid R1300 to sit with a bicycle in my possession while we awaits for feedback. My son is so disappointed and I have bought so many thing from the store and have never had issues when returning defective murchandise. I guess when its comes to high value stuff these guys want the consumer to feel the pinch if its defective. Im highly saddens by this awful experience and it has caused my son to act up on me. Really bad Cash Converters. I will definitely pass this reviews about them to my huge groups in Midrand. *******