Help Save Teddy

I bought teddy from a pet store that I will not name because I am planning to sue them for selling sick animals. From the first day I got him, he was throwing up and coughing terribly. I was conerned and called the store. They told me that “kennel cough” was normal in small puppies. I ignored his cough for a couple days until he started vomiting more and even had diarrhea. I took him to the vet that the pet store provided me. This vet works with the pet store. The vet told me he had a cold and prescribed me some drops and anti-biotics. A week passed and no improvement. I took him back to this vet and they wouldn’t even fully examine him or run any tests on him they just looked at him and sent more meds home. The vet told me to give it a week or two and it’ll go away. The next morning I woke up and Teddy seemed so sick something told me he wasn’t doing okay. He wouldn’t eat or get up from his bed. I took him to a vet specialist at a hospital on sunrise and I had to pay out of pocket. I told them to run all the tests they needed because I wanted to know what was wrong with my teddy. I paid 800$ just for him to be examined. He was diagnosed with anemia, pneumonia, high leukocytes, and viral infections. The “kennel cough” that the pet store assured me was nothing turned into pneumonia and the pneumonia turned into anemia. That same day the vet specialist assured me he had to be hospitalized because he was in danger of dying. Of course I said yes. The amount for him to be hospitalized was 3,000$. I had to open a credit card with the hospital
 (care credit) and put that amount on the card. He was there for 4 days. They sent him home with treatment and a whole bunch of medications along with prescribed dog food that I had to pay for. Everyday for the past week I have been taking him to get blood work done and X-rays, everyday I go there is around 600-800$. Iv been calling the pet store to complain and beg them to help me with these bills when they KNEW they sold me a sick dog. All they said was they don’t cover anything after 2 weeks. Teddy is still sick and his anemia has gotten worse and his white blood cells keep rising. Thankfully it’s not cancer. We have no idea why his white blood cells keep rising and I need to go to a pathologist which I have no money for. I don’t know how long I can take more of this, seeing him so sick and suffering is so heart breaking for me. I just got a job to hopefully save some money for all this. Please anything would help us. I never have begged anyone to help me, but seeing teddy suffering has pushed me to do this. Anything will help. I can only hope teddy can recover from this and live a long happy life.