It depends Andrew,
PP is one avenue. The other is if your PP purchase was financed with a credit card or directly from funds. I fund mine with one of my business credit cards. I wouldn't sic them on a dog. One phone call and they yank the money from a vendor's account until a full accounting has been given.
Your case would be a slam dunk. But, if you funded through your bank account, all you can do is bug Spydieguys mercilessly and perhaps they'll send your knife to get rid of you.
There's always
http://www.ripoffreport.com/ to turn to. Also their Better Business Bureau. I would try to resolve in the order I wrote, including the link in an email to Spydie Guys. As a merchant, I wouldn't want my name in these places.
On the bright side of things, if there is one, many people learned lessons on "trust" for a much steeper price than you did, losing their entire life savings.