Update on this - after nearly 3 months in total since the claim was filed, I finally got hold of an actual human being (via facebook) who told me that he had seen everything that had been submitted and that it would be taken care of. In the meantime I sought out a facebook friend in Taiwan and had him actually go to the police and physically file a report for me, and I sent them the picture of this report confirmation (albeit in Chinese). He thanked me for that, and said to keep an eye on the email...
"
We have completed the following investigation:
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Transaction Details
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Buyer's name: hung chiaying
Buyer's email: yilan1980@outlook.com
Transaction date: 3/11/2014
Transaction amount: $774.00 USD
We have issued you a refund in the amount of 774.00 USD for this claim and have granted your appeal. The refund will be posted to your account within 3-5 business days, if not sooner.
Thank you for your patience and cooperation."
The nightmare is over. And I hope the police investigate this scumbag scammer.
Peace at last!