Brace's Been Cut !
Looks like you have met a unsavoury "hand rapist" but you bought in the UK so OFT will take this up, "he's screwed". Now his supplier in the USA and, "you will need to find" the name, county and state of the origin of the purchase for the anchor you now have. OFT will get into the books and should be able to supply the purchase supplier for this. Then you contact the local Assayers office for that county and put your case to them in writing. In goes the IRS and you will have the satisfaction of knowing that this original supplier will now have all his possessions seized as he will have de-frauded the USA Tax Man, and the tax debt will be cleared by the sale of these possessions at auction. I.E. the possessions are put on sale for the Tax debt owed. Owes $10,000 tax, any USA citizen can buy his house for that or business or pickup, trailer etc. He gets a nice photo and a record. He cannot clear the debt by paying on the spot, but he can buy back his original stuff if it has not sold when he comes out & he has enough in the bank or someone lends the cash ( got to be some mate for lending). OFT should get your money back and the USA scenario will give you satisfaction, takes around 2 years though.
Geoff Hauser Racing in Northampton is the guy to go to for Bow Tie Motors, he is Niagra Falls for anything Bow Tie, does all the ASCAR series motors, "shut up listen" and enjoy what you want, he has "been there" "won it" " seen it " " got the T shirt" and now young "Scott" wins because Dad knows what he's doing.
If you have your old motor still, "Geoff" will be able to sort it for you and you won't need trouser brace's.
Hope this helps & yes we do not live in a perfect world.