No, what you see is not what you get, especially in regard to dogs.
I am sorry this happened, but am wondering how well you researched this breeder?
Did you ask around, or maybe go to shows? Did you look into this breeder's track record? Maybe find out through the breed club what their reputation was?
It does pay to do your research, but too little too late I know.
How long did you wait for a pup to become available?
I don't think that running the breeder down on this forum is going to help your situation, so why not put your energies into concentrating on getting your dog the best treatment possible and giving him a relatively healthy life.
Good luck with him.