Jack Russell Terriers / BAD Breeders
I am very familiar with this situation. Becky did NOT sell this pup. She only owned the father. She never owned this "Pup". She does have a contract and does take back her puppies if needed. This dog was NOT one of her puppies. She has never even seen this dog. She is not a "backyard" breeder. She breeds and shows champion dogs. She breeds very rarely, and always with careful consideration as to which breedings will improve the breed she loves. She is very careful about whom she will allow to buy her puppies. Many interested buyers are turned down. It sounds like you started out by sending an accusatory email, and cursed at a person who was not responsible for this dog being in the shelter. I'm not surprised you got a defensive reply.
If anyone is looking for a healhy, well bred Jack Russell Terrier, I cannot recommend Rebecca Paff highly enough. Breeders don't get any better!