Nothing but neg him unfortunately, you can't make him send it, just don't pay for it and if you have paid open a case at the first available opportunity if he won't refund you.
Sounds like it went below what the seller wanted or you've been backdoored. Do you mind sticking the link up? Wouldn't mind a little fun and games with the seller.....
I would leave the feedback and then accept the cancellation but I think you should be able to feedback anyway
maybe post a link to the seller on the "sellers to avoid" thread on here