Bought business class ticket but "protected" in economy. Refund?

Hi all,
I am scheduled to fly tomorrow from NYC on a mileage ticket in savor business. my original flight (509 LGA-DEN) has already been cancelled, and I was "protected" on an earlier flight in economy.

Am I eligible for a partial mileage refund since the original ticket was bought as business and they delivered economy? For what its worth, obviously there is no saver award availability any more as most flights are full, though there was when I bought the ticket.

Thanks