Extremely Poor Customer Service regarding defective UHD TV

I bought a LG UHD TV at Makro in Springfield with a two year warranty. Some pixels in the bottom right part of the screen had some kind of green discolouration.

I wrote a review on hellopeter and an LG representative reached out to me to sort this issue out. Thus far, LG has inspected my TV on three different occasions and apparently replaced the LED screen, however I am still having the same issue with the discolouration. LG has told me that I need to take up the issue with Makro as the TV is out of warranty, but even when it was under warranty, they did not fix the defect. I have contacted the LG call centre personally several times over the past three months, but am still unable to resolve this issue and am fed up with the pathetic customer service.

Please can an LG representative contact me and help me move this issue forward as I am at my wits end.