If you deposited by PayPal, file a complaint immediately. If by credit card or bank wire, contact your bank immediately.
File a complaint with econsumer.gov - Your site for cross-border complaints.
Then check the other forexoma threads for contact info for the Ontario Securities Comission and also the regulators in Hong Kong.
If there is a place in your country to file internet-based financial fraud complaints, file one. US citizens and residents can file one at IC3.gov