The best way to get these guys to respond is Negative Feedback on eBay.
If you are still within your time limit, open a paypal dispute immediately, don’t let them persuade you not to take this step as it is the best way to get your money back.
Report them to eBay. eBay dont really seem to give a damn, but if enough people complain to them, maybe they will take action.
I have been told that the Consumer Council of Hong Kong can help. Click here to lodge a complaint with them.
The following 2 options have been provided by eBay, and maybe if enough people report them to these two sites, they will do something as well:
Since you’ve transacted with a foreign seller, you may lodge a complaint through the econsumer.gov website. Econsumer.gov is a portal for you as a consumer to report complaints about online and related transactions with foreign companies or individuals.
To file your complaint with econsumer.gov, follow these steps:
1. Click on this link http://www.econsumer.gov/english/ or copy this URL
to the address bar of your web browser.
2. Click on Report Your Complaint tab.
3. Click on the Report Your Complaint button.
4. Fill out the Complaint Form.
5. Click submit.
I would also advise you to file a complaint to the Internet Crime Complaint Center. Just click the link below to do so.
The IC3 reviews and evaluates complaints, and then refers information to the appropriate local, state, or federal agency. Every complaint that is referred by the IC3 is sent to one or more law enforcement or regulatory agencies that have jurisdiction over the matter.
Please let us know by adding a comment on this site if you know of any better way to get a result.