This may sound a little snarky but if I were that reputable breeder and I saw that you were that unhappy and did not trust me, and then go posting pictures and saying you dont think the dog is the same one on an open forum, I would get the puppy back from you. The reason I am saying this is not to hurt your feelings, but usually when buying a show prospect from a reputable breeder you at least need to trust the breeder. In this case, maybe the reputable breeder is not so reputable.
Dont know. Dont have all the info, so its hard to say. Hope you get this resolved though.