To balance this discussion, when my wife or I contacted the breeder, post sale, we got support. My recollection over the years is at least three times we had a question, and all three times, we got an answer.
Even more, we had a contract on a kitten for my son as a gift. We had even visited and saw the very kitten. When the time came for delivery, there was a delay in getting back to us.
Holly herself wanted to talk to us about the delay and would not let the staff release the information. Holly was out of the country at the time.
Turns out, the kitten had a massive seizure and died. Holly wanted to tell us directly and make arrangements for another kitten. I can not fault her for this business decision to wait a few days and make the call personally. This is my experience with post delivery support.