I would make a copy of the warranty and send it to them with a request that
they honor the warranty in the box. I would also send a copy of your
request for repair under terms of your warranty to the Better Business
Bureau. If they still refuse to honor the terms of their warranty I would
contact the State Attorney Generals office to intervene on your behalf.

I don't believe they can change the terms of your warranty. They can
however change the terms of future warranties.

Sarge