Have you tried to gold down the power button for like 30 seconds and see if it will restart.and if that doesnt work try and hold down power button and either volume down or up at same time not sure on the combo power and vol up/down so try both ways you want to get to recovery screen, and see if theres an option for factory reset, and before trying all this make sure you charge the battery for a little bit. Hope this helps
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Have you tried to gold down the power button for like 30 seconds and see if it will restart.and if that doesnt work try and hold down power button and either volume down or up at same time not sure on the combo power and vol up/down so try both ways you want to get to recovery screen, and see if theres an option for factory reset, and before trying all this make sure you charge the battery for a little bit. Hope this helps