Not to make light of your problem but you do have his address and can always take a page from Ted Kaczynski's "Manifesto" and send him a "special" package!
Just kidding of course and trying to make light of a bad situation. If you used a Postal money order try the post office. They can be very helpful.
GOOD LUCK!

P.S
He also has a good feedback left after your bad one FWIW.