We are sorry to hear about your experience with the recent updates on your Samsung Galaxy Tab A7 having hanging or freezing issues, and we apologize for the inconvenience it caused you.
Seeing your beloved Samsung Galaxy Tab, after an update, not move, I'll begin to worry too.
So, I highly recommend bringing your device to the nearest Samsung Service Center in your area.
Rest assured that our Samsung Engineers/Technicians are competent to assess your device with suggestions, and offer to provide prompt solutions to restore it up to optimum performance.
For more assistance and guidance, you may contact us via our online Samsung Customer Care support channels below.