Yeah your TV isn't Google certified.
I've never heard of the brand and you should probably talk to the reseller or the manufacturer if you can find a contact. Usually, there are hidden tricks for resetting the TV. For example, with my TV, which happens to be a TCL, you can do a factory reset by disconnecting the power for 10 minutes and then holding the power button down while it's turned back on. You need to get in touch with the people who sell or make the TV.
I was having the same problem and trying a few things and not much seemed to work.
Randomly pressed the home button twice and it worked again.
Could be worth a shot if you haven't tried it.
Ok, so while I was at work my dad was trying to turn it on with the power button while mom was pressing random buttons on the remote.
And they somehow managed to boot into safe mode.
So I told them to check the list of installed apps. They sent me the picture and I saw that ATV Launcher is missing from the list, even tho I installed it and set it as default Launcher.
Then I told them to restore TV to factory settings and then TV booted normally.
Could it be that installation of ATV Launcher somehow got corrupted and the TV got into bootloop because it was trying to load into Launcher that wasn't there?
But it's still weird that a simple app like a Launcher that doesn't require any special permissions and doesn't modify any system settings can cause a bootloop.
I'll have to investigate this a little bit more when I get home.
I have no experience with this TV. Leave it for 2 hours in boot, if it hasn't booted, unplug for 10 minutes and try again.
Otherwise refund