Just keep pushing the issue and they will eventually open the claim for
you. I've done it a couple of times. They often start by telling you
it's not possible. It is possible.
If you are getting your money back and free return shipping you have
nothing to complain about. That's the point. Maybe the seller makes some
kind of rude comment in the process. Big whoop. Your not royalty. All
the worst things that could happen to ...