If you finalized then SR resolution cannot help you I'm afraid, that is why you should never FE and use the escrow system. I understand you may have finalized in error, not really sure how you would do that to be honest but anyway you are at the mercy of the vendor now and I would be very surprised if you get any joy from them, they have people claiming no shows all the time trying to scam them so unless you have a good relationship with them I say take the loss, learn a valuable lesson and move on.