Worst customer service

Worst service ever. My tv broke last year September and i paid R1500.00 so that they can replace the backlights. Ever since then, every month i experience the same problem with my tv. I have taken the tv to them 4 times already to fix. They always promise to call you back and they never do. You always have to run after them and when you eventually get hold of them, they shift the blame to someone else. I called monday morning, 23rd April 2018 to inform them that my tv is giving the same problem. It's been 48hrs and they havent called me. When i called them on tuesday i was told that a technician will contact me before they close for the day. Its now 18:17, I still havent received a call from them. I'm so fed up with Teljoy