in short, blow away the blocks and start all over in downloading them.
without bootstrap zips of the blocks i'm dis-inclined to consider this a solution with my metered internet usage.
especially without assurances it wont keep happening on a regular basis.
no biggie, plenty of other altcoins to play with.
Sorry to hear about your internet usage being limited, that must suck. I hope soon it becomes illegal for ISPs to do that. These syncing issues are being looked into which some people seem to be having, and it is a solvable issue.