Horrible service from East Rand Mall branch sold me 3 years old item that was used

I bought a Hifi Sony with a laybye, for 3 months I went to finish and collect the item on the 25 July 2023 the first red flag the box had too much dust and I asked the guy of why it's so dusty he quickly found a cloth to wipe it off. I got home and unboxed the item the home system has a dusty, the DVD also is very dusty and has finger prints all over like someone was eating and touching it, when I checked the speakers box it's showing that is was packed in Jan 2021 the wood cover at the back have scratches and its lining is coming off, this system was on display for almost 3 years and they have sold it to me as an unsuspecting customer. I'm so angry so disappointed with this. Basically they sold me a second hand hifi system. The item is used I am so mad and disgusted right now. Why would you give me a used item like this one. Never in my life I would buy anything from this furniture shop again. I want and exchange or refund my money asap so that I can buy it somewhere else.