Did Corporate tell you the claim was denied or the Service Manager?

Dealers make less money on warranty work than they do on cash customers so if you're dealing with a crooked Dealer or Service Manager that gets a bonus based on sales, you're going to get blown off every time on a warranty claim for a 7 year old car.

If you go back with the supporting documentation, they'll begrudgingly resubmit the claim which will miraculously clear this time.

Myself, I'd take the documentation to a different dealer and go from there. No sense rewarding a business that uses fraud to pump up the numbers.

Kevin