OK Furniture sell empty promises

I called the customer care number 4 times in the last week, but nothing. Last week I went to your OK furniture store in Engcobo. I did a purchase of a JVC 6.2 channel home theater system. After it was delivered to my house in Elliot I returned home on Monday, and noticed the 2 speakers had dents in them, as you see on the attachments. I reported it to the store and told them I am not satisfied with it, and the sound quality is not good. I retuned the system to them in less 4 days. They said they will set it up in store and call me to listen. They called me later and I went. The guy at the store had it connected totally wrong. They had the Sub speaker connected to the amp on the front speaker slot. They had the front speaker connected to the back speaker slot. They had the center speaker connected to the sub spot. When I saw that, I told them it is connected incorrectly and it can cause problem to the amp if they connected it like that. I walked out and requested a cancellation. The staff there doesn’t not know how to operate the stock sold in your store. When I go in the store, they say the SI is not there. Or the manager is at the store room. Today I got told they not going to cancel or refund me until the supplier picks it up and looks at it. Your staff connected the system up incorrectly and I am not prepared to pay for good I’m not 100% satisfied with. I am requesting a cancelation of that purchase and for me to get my refund of R1100.00 I paid. I was prepared even to take a soundbar in its place for it even had better sound than that system, but now. All I am asking for is the cancelation and my refund.