Smart devices are still new to me.
Have you tried removing the battery while the device is on?
Also there should be a procedure to reboot at a default level. I don't remember the correct terminology.
You obviously can access the internet...so search on line for the factory-default-reboot or root-boot, something. It involves depressing more than just the power button at initial power-up.
Hope this directs you towards a solution and not the pollution.
QUIT DRINKING FROM PLASTIC BOTTLES...water, pop, juice....It is killing you and our planet. Well if it kills our planet then it is safe to presume, (well unsafe) that humans will be dead before earth is.