20K TV does NOT work anymore!!!

I'm not satisfied with LG's disgusting customer service. I spend over 20k for a LG SUHD SJ800V TV in December 2017. My TV doesn't work properly anymore - It just restarts on its own every few minutes. I connected the TV via a Ethernet cable to the modem so I can stream Netflix, Amazon, Showmax and YouTube as the WIFI stopped working on the TV last year. It worked for a while but this is giving issues as well. It loses connection all the time. It is not my Fibre internet line as all other TV's and devices in my house work perfectly. I emailed LG in February and I just got a random response with no help. This issue is going on since last year and than you get AMOS MAMABOLO (manager) who wants me to pay to get it fixed. Honestly this is putting me off LG especially since it's not a cheap TV - this issue should be sorted by them!!!