Bid or Buy / The Black Knight - No delivery/Theft

I ordered a ring in October and did not receive it. Beginning January I received the incorrect item and returned it. Since then there has been nothing. The Black Knight has closed off their attempt to do business. If anyone want to get in the boat with me and take legal action you can find me on LinkedIn (Chris Meyer) - send me you details and possibly we can work together against Cathy and or Bid or Buy. R26k down the drain? No way...