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Hello and welcome to JustAnswer, I look forward to assisting you today. Feel free to disregard the Premium Service Offer for Remote Support. That is an automated popup initiated by the web site. Does your model have a reset button located along the side or back?
My apologies, but I am unable to contact you by phone at this time. Can you turn the tablet off by pressing and holding the power button?
If you are unable to power it off, try a combination of the power button and volume up button. Hold both until you see the on screen logo then release.
You need to press and hold the reset button for about 15 seconds or so.