Brand new ONN Roku TV cought fire!

Only had this tv two weeks when I heard a loud pop and hissing noise followed by tons of smoke rolling out from the bottom of it! The TV wasn't even on. I unplugged it and pulled it out from the wall on the mount. I immediately called my husband who is a firefighter and while otp with him the smoke slowly subsided. The electronic board on the back of the TV was hot but not melted. My husband told me to keep an eye on it bc the plastic likes to hold heat and may recatch. It stayed warm for about an hour before cooling off. My whole house smelt if burnt plastic. I am just thankful I was home to unplug it!! Not only could we have lost our home but our cats and dog too. I have called the manufacturer multiple times and have been assured each time that a member from their safety dept will call back within 24 hours. I had our case escalated and was assured a manager would call back within 24 hours. We are now on day 6 with absolutely no response and continual stonewalling from ONN. Roku help!