Dying Corgi Puppy - Emergency Surgery

I “purchased” my puppy Lydia on 11/11/2020. Since I received her she has been to the hospital 3 times... once on 11/13/2020 for a since visit. She was sent home with medications. Same day she was taken back to the hospital for an emergency stay as she was losing blood and vomiting. On 11/14 I picked her up and was told to put her on a bland diet and monitor..I have her on several medications for several infections and possible worms.

Same day I found myself rushing back because Lydia now diagnosed with having a Bowel Interception and I now have a $5k vet bill. When I told the store I had to bring her back because she would die, they told me to figure it out or get a care credit. I was told if I brought her back they would call the police and state that I have neglected her and it would be abandonment. They also refuse to pay any costs or accept liability due to the infections and surgeries not being a hereditary cause.  

My dog has to get the surgery by today or this 11 week old puppy wont likely make it. Please help... 

Lydia is on several medications a day just trying to get her back to normal.