Nadya Luxury Kittens review: Kitten sold with fip 16

Hello everyone!
I bought a cat 2 years ago from nadya-luxurykittens located in brooklyn new york, and I fortunately he was healthy and still.
However, I decided this past year buy another one, so I believed she would be the same, and went there on dec 23 of 2020 to buy the new kitten, $1.500 a scottish highlander straight, when I arrived at her place it had around 20
Kittens in that small place running around, and I felt so bad that I took my kitten feeling I would save him from the overcrowded cat place. By the moment he came home, he had diarrhea for days, I texted her about, I was concerned if was the new home, stress about my older cat or even a deworm. I took him to the vet we gave him deworm and probiotics to use in home, the vet asked me if he really was him, because his testicles didn't show and he was already 4 months and half, and then I told her wait the "contract" shows he is neutered, so the vet said oh ok, even though she felt unusual. After arriving in home I asked N. about this, and she always arrogant said he was not neutered, she would never do that to a scottish in that price, so she explained that "contract" was wrong, it was for another cat. After this incident two weeks later, he went to the second deworm and the vet realized only one testicles, but we would monitoring him and another appointment for march beginning was scheduled.
Everything concerned to the diarrhea seemed solved, however on feb 10/21 he stopped completely being him, he changed his behavior towards eating, drinking, playing, he was depressed, lethargic only sleeping and the same way we would leave him he would be for hours. So I went to the vet again, very concerned what was going on with him, and the vet gave me the best possibility she could since it's a clinic with basic equipment, so she said he had done blood test and, x rays and it was not good results, he had fluids in his chest, lungs, abdomen, he was dying and that's why he was in the way he was. I was devastated seem my little cat like that, and she said he might have fip, a various serious disease that is fatal, and my world was completely dark knowing all of that.
Euthanize options was offered and I couldn't accept that, so I went home with him, and I started looking into that disease and it learned about coronavirus for cats, that's transmitted when you have over 5 kittens using the same little box, now imagined when I said the moment I took him he was with 20 kittens + -
That explains how everything started and that's why the diarrhea, one of the symptoms of the coronavirus for cats, after that the virus mutate into fip feline infectious peritonitis.
I started looking for help, I found groups in facebook that fight together this disease and my kitten started being take care.
When I told her, she didn't give any support about my situation, she suggest me to buy a illegal medication online, like she has a lot experience in what she was talking about.
It was more than just buy medicine online, because I had my kitten with fluids and fever, and I needed a hospital that knows about the disease to take care of him and stabilize him.
It was not cheap but we decided to do everything we can to help that little kitten.
I feel very upset to know this person probably have more cats and kittens with the disease and she will spread this pain not only this cats but also destroy every family that will receive those cats, because it's not easy. From the bottom of my heart I would never wish no one this, because it's devastating.
And there's only two options or you spend a lot of money to save him or you need to euthanize him.
So please, someone help, this person just care about make money, litter after litter, over 10 breeds of cats all together, she's abusing those animals.