Hisense 32" TV

About a month or two back I bought a Hisense 32" TV from Hi-Fi Corporation. When we got home and installed the TV, it gave us problems with switching on with the remote and on the TV itself. We had to plug it in and out a few times on the plug to get it switched on at the tv itself or sometimes with the remote. It stopped doing it for a while that is why I never took it back immediately after purchasing it because I thought the problem was fixed. Unfortunately after a while it started doing it again and then I decided to take it back as I was not prepared to have problems with switching it on the whole time, sometimes only after the fifth or sixth time it would switch on. We went back to Rustenburg Hi-Fi Corp where I purchased the TV. The lady working at the servicing or repairs till(Bezulu) didn't even really listen to our story, she just said all the can do is send it back and MAYBE we will get it back within 21 days. My husband explained to her that we cannot wait that long because it is the only TV in the house. She didn't really care and said she will call the manager, Isaac. He also had the same attitude, not even really listening to my Husband story, and said the ONLY thing they can do is send it back and also maybe we can get it back after 21 days. My husband said he didn't really want a TV that was worked on and opened up because the TV systems are never the same after that, and my husband also asked them what if it starts giving problems again , the response was it gets send back again, and if they cant fix it after the third time the only they will replace it with a new one? My question is why cant the just send it back the first time it gives problems and why do we have to wait 21 days for something that is not even our problem and something that we paid for? It is unacceptable!