JWA or GWA Diamonds offer to sell my portfolio of jewelery to HongKong - wired money for bond( to cover shipment & authenticity) & taxes due on sale through HSBC bank-then no further contact from Dale Harrison or Michael Risman Laval Quebec

After aquiring a sizeable portfolio of emerald and diamond jewelery my wife and I were trying to liquidate - We had not been having a great deal of success - most outfits just wanted to sell you more with the promise of a big sale which never reaches a conclusion for many different reasons.  We were put in contact with a man named Mark Risman who was representing a firm called JWA diamonds (John Weinberg & Associates) a new company that had just recently bought out GWA diamonds(Goldman Walberg & Associates) at which both he and Dale Harrison had previously worked.  They convinced us that a bond was required to ensure the buyers in Hong Kong would have insurance on the goods being delivered and as to their authenticity.  It was for 6% of sale proceeds.  Then we were informed that we needed to pay the taxes to Hong Kong government and these would be refunded after sale had transpired.  These monies were wired through HSBC bank to an account in Hong Kong and after continual delays in getting my sale proceeds transfered I was unable to make contact with anyone at all and the website & office have been shut down.