Beware of LG Smart TVs

Has anyone else used LG TV software upgrades and ended up with bigger problems? Well that is exactly what happened to me. LGs instruction were followed to the letter and immediately after the picture was distorted. It was impossible to get anyone from LG. I decided to call the technician in the hope that he will present my case to LG even though it would cost be a R450 call out fee. The technician stared at my TV for a few minutes and declared that the screen is faulty. He then sent a quote of R29 000. REALLY!!. LG did end up responding to my e-mail on their website. Amos, from the Service Department, initially advised that the TV will not switch on if the upgrade did not work. Not so. The TV switched on after the upgrade, but the upgrade did not work because we still cannot watch a full movie off a USB. And NOW the picture is also distorted. The "Customer Care" consultants Amos and Olivia just decided to ignore my e-mails without providing satisfactory responses to the following: Why is it that when the TV is switched on there is nothing wrong with the screen? Why the upgrade did not work to solve our issue?