I understand your frustration, I went through a simluar thing with Max, and I was very upset too!!
If you call the AKC, tell them the breeders name and the date of the litter they will tell you if the litter was even registered and if so when. I am not sure if they are obligated to tell you but if you ask nicely they probably will
It might help to know if the litter was even registered, or if it was registered late or not at all.
Good luck and keep us posted.