Poor quality products, poor customer service

I bought a 55inch tv from hifi corporation which up to date I've had to take back 3 times for replacement, which is extremely inconvenient cause i have to wait for weeks for the tv to be assessed. Although there's no external damage its just poor quality & factory faults. I don't understand how such a product can be sold to the public, not only do i have to go back to the store on a regular basis to take back the damaged tv, but i also have to remain without a tv for weeks. The worse part for me is buying something and not being able to use it because its always in for repairs. Now i have to wait for the tv took back This is truly inconvenient.