Well, sadly, I'm in the same boat. I bought the sweetest calico girl with breeding rights for $1700 USD plus shipping from Alopecia who was born in September of 2006 and shipped to me in December 2006. She arrived with an URI which never cleared up, she never really grew to full size, she had chronic diarhea but, she was the sweetest little cat I had ever owned. 10 months later, a boy arrived from another cattery to be her stud. He contracted herpes or some other chronic respiratory virus from her and ended up in intensive care with pneumonia and nearly died. At that time, my girl was diagnosed with a grade 3 heart murmur and she was just 1 year old. By Christmas, we had had very expensive tests, as required by Elizabeth to fullfill the genetic guarantee in our contract. I did not want to send Izzy back as Elizabeth had advised me to euthanize her and I knew that tht was what would happen to her. I sent the results of her heart scan which showed hypertrophic cardiomyopathy. Elizabeth denied that she had ever had a cat with this genetically dominant disease. This, of course, would be impossible. Between January of 2007 when she received the results of the tests and now, Elizabeth has refused to refund my payment to her and neither has she followed through with a relacement kitten. However, given the health of her kittens I would be very reluctant to have another kitten from her and would prefer a refund. Izzy died in July of this year. She wasn't yet two. I still have a broken heart about it. We should have a house full of glorious kittens at this point and, instead, it is sad and empty. I would go through small claims court but live in Canada so will need to look at the legal issues around cross-boarder legal claims. This adventure has cost me over $6000.
