HORRIBLE LG AFTER SERVICE

I bought an LG 42\ TV through one of their vendors (OK Furniture) with extended warranty. I took the TV in for repairs as the screen was flashing between bright and dim. I was told that as it was extended warranty the repairs would not receive priority. After 2 weeks with no feedback I called in and was told that the person dealing with the matter is on leave. After 4 WEEKS and putting up a fuss I was told to collect the TV.<br> <br> The report said there was nothing wrong with the TV and that I should replace the cables. I have tested different cables and devices and the problem persisted. Whether I use a hard-drive