Angry and disappointed customer

I am angry and disappointed with this store, I bought a LG smart tv at witbank branch since I am working around there but I am residing in Midrand,I took the LG 55cm tv home I didn't open the tv because I had to buy the dstv set first ,then went back to work , during my off days I went to buy the decoder in midrand when the guys that came to install the dstv arrive I also requested them to open and take the tv out from the box and do the setting for me and install, only to find that the tv show even a blue light or positive sign that is on it was jst showing grey light with no picture, I reported to the branch where I bought the unit they said I can take it to the nearest branch jst to check it what's wrong now I took it to woodmead branch there just booked it for service, I informed witbank branch the after a day I receive a message that says the LG tv is under repairs, take note I never even used this unit but now is taken for repairs I contacted the witbank branch and ask them why is your unit going for repairs yet I didn't use it they said unfortunately they can't assist because matter is dertimined by the technicians I told them I need them to replace the tv because I never used it, but they wish they can help but it's not their call to do that If you buy something in the store and it's faulty, isn't their right to take it back and give you a new one Hi-fi corporation is not treating me right as a customer how many people have you done this to I bought this LG smart tv cash R9000 now it's like I am being ****** my money i can't be assisted right as a customer I will not accept a repaired tv yet I never used it Now my concern is Hi-fi corporation works like a ponshop selling things that are faulty they don't sell quality and having unprofessional staff that can't resolve issues like this, telling me that they can't assist it's the technicians decision did I buy the unit from the technicians? I am very angry for such poor service and unfair treatment I received from this store