J.S.
I agree talk to a lawyer, chamber of commerce, etc etc
You didn't really 'opt out'* you got divorced! You were not going to be living there anymore!
Also contact HEAP if that is still their name...
We have a plan (not the same $$ every month but the higher we pay in one season covers the difference so if they tried that on us it would be on. Plus I keep my paperwork-do you have a copy of the contract?)