This is awful that you have to spend some money on your dog, but really, with a condition like this I don't think it is fair to be so vindictive about your misfortune. It is clear that you are angry, but
life is fragile and these things can't always be foreseen. You should be responsible for your dog. If there is no way to test for this and it can also be caused by physical over-exursion, then you cannot truly come on here and try to ruin somones name because you want to blame something on someone that you can't prove was her fault. Yes, she bred the dogs but when you buy a dog it does become your responsibility. It is clear that she gave you a choice which is stated in your contract. You have rejected that, which you signed in agreement to, and also will not supply the medical records?!? What is the breeder supposed to do? How do you work with someone like that? I feel bad for the way you've brought this out publically without even sharing the information with her , that isn't the way to go about things.
Good Luck getting anyone to work with you to solve any problem.