sansa clip freez, with screen appeared upsidedown

my sansa was freez once, i updated and its fix.

for a while i was listening to it, the screen appeared upsidedown. (i ignored it)

in a couple of day, i turn it on. and it freeze at the start screen (with a upsidedown screen)

i try to do the same and updated, but its unacessible i cant even format it too 

so can any1 help me??