I do not know where this vendor is from and being at work i have limited time to research, but maybe a complaint to the better business Bureau (Canada) or the US equivalent is warranted. Depending on exact circumstance, a police report should be filed and possibly initiate a civil suit, depending on the law of the land it may just give him the push he needs to give your money back to avoid the fees. Post your stories on Facebook too.
Conversely, can't say I recommend this, but a quick desktop investigation should yield you his address, people have a harder time lying to someone's face and avoiding them especially if you show up with a couple of your friends. I am surprised he got vendor status on here, is it as simple as paying a fee or did he have a good track record until recently?
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