Bobert:

Sorry (but not surprised) that you got screwed.

We once got Blue Shield to reverse their decision not to accept a claim (different from cancellation) by sending them a letter which stated all the facts in detail and clearly demonstrated how dumb they had been. It ended by asking them whether they wanted to honor the claim or have us send the letter to the state insurance commissioner. They paid the claim.

You might try that technique.

Bev and Jerry