Have you called Amazon Kindle support? 1-866-321-8851
They will probably have you do a reset, have you tried that already? Press ALT + Shift + R If that doesn't work, try using the reset hole in the back of the Kindle: Straighten a paperclip, insert the end into the hole, hold for about 15 seconds (give or take), take paperclip out of hole. If that doesn't work, you could format your Kindle - but I think you should call Amazon first.
They will probably have you do a reset, have you tried that already? Press ALT + Shift + R If that doesn't work, try using the reset hole in the back of the Kindle: Straighten a paperclip, insert the end into the hole, hold for about 15 seconds (give or take), take paperclip out of hole. If that doesn't work, you could format your Kindle - but I think you should call Amazon first.