I’m assuming that you’ve poked every hole that your phone has got?
The phone’s reformat function is part of the phone’s menu that you can’t access right now… It seems there are only 2 options available:
1/ Take your battery out and wait for the backup battery to run out as well so that the phone (hopefully) forgets all information and reverts to factory defaults…
2/ Take it to Motorola and have the technicians sort it out for you. They’re quite nice, but if the mother board is the problem i think you’ll be expected to pay about HK$800 for a new mobo.