Hisense Service Department - Shady

I purchased a TV in 2016 from HiFi Corp. Hisense had a 4 Year Warranty extension at the time that needed to be registered online - which I did.

From the time I got the TV, the USB drive was not capable of effectively showing certain 4k video files. It is a 4k TV. Depending on the native aspect ratio of the file, certain videos will play with a bright green bar at the bottom of the video, across the screen, making the video unwatchable. It does not do this issue with files that have a native aspect ratio of 16:9.

I brought this up as an issue within the final year of my warranty period, once I finally figured out the problem. The Hisense Service Department sent me a software update which did not fix the issue. When I rep**** to let the department know that it did not work (along with an attached image of the issue), I received no reply.

Now the TV is out of warranty and Hisense does not want to fix it. Were they waiting for the unit to go out of warranty so that they didn't have to fix it? Why ignore a fault?