Hi my name is ***** ***** I will be the expert working with you today to help and resolve the problem you have posted.I am sorry to hear that you are having such trouble. I will try my best to help you out and resolve the problem as quick as possible.
Unplug the charger and then press and hold down the power button for 45 seconds it will shut down the tab.
Wait for 3 mins and then power it on in normal way we do.
Let me know how it goes.
Take your time and let me know after you try.
how old is the tab, is it under warranty?