
Do you have anything in writing which states that you were buying a KC Reg puppy? Were the puppies advertised somewhere as KC Reg? If so, you should have a good case if you go to your local Trading Standards. Even if you don't have anything in writing, it is still worth contacting them. The chances are that the breeders haven't registered the litter because one or both of the parents aren't registered, so they
can't register the litter. do you have any proof that the pedigree you have is genuine? You could try contacting one of the BM breed clubs. Don't suppose this breeder is a member, but on the offchance they are, the breed club may be able to help.
Sorry you've had such a bad experience, but buying a puppy is just like buying anything else for a lot of money - sadly, you can't just take people's word for what they are stating.
Hope you get some satisfaction as breeders like this shouldn't get away with deceiving the unwary.