Ah, now I know why I self escrow. I've always went with a mortgage company that would let me out of escrowing.
But to your delima, I would contact your County Supervisor. Hey, what else do they have to do for the constituents (sp?)? Explain the problem to them and let them know it was not only you. Also tell them that supposedly the check cleared last month.
The other thing to do is sit in the assessors/treasurers office (not the low life at the counter, the actual top assessor or treasurer for the County) and call the mortage company. Then have the County try to wiggle their way out of it. Or vice versa if the Mortgage Company is not telling the truth. A check that large doesn't just disappear. Plus, in today's age, you'd think the mortgage company would have EFT'd the funds to the County.
Another option, call one of the TV stations. They would be all over this for "Contact 6" or "4 on your side" or whatever else the local channels have. It will be either the county or mortgage company looking bad. And with 352 people that this happened to, it may make one of the top stories on the news.
Good luck.
Here's some "dust stuff"