Help save gracie

Hello, my name is Anne and this is gracie. She is a 9 week old ragdoll kitten that we got on Sunday August 20th from a breeder in calgary. The first day that we had this sweet girl she seemed totally fine, but she wasn't eating or using the washroom. On August 22 only 2 days after we got gracie my daughter and I rushed her to the vet as she had collapsed and was breathing heavy. As soon as we got to the vets one of the employees seen me holding her came up and grabbed her running to the back of the clinic. She was in a severe state to the point where she was struggling to breathe.
They immediately started running tests and giving her xrays to see what was going on. After the xrays were done they called me to the back room, she has a severe case of pneumonia and needs to be in an oxygen tank at all times in order to breathe at all.
It's now been almost 3 days since the begging of all this and the costs are becoming more and more. We know that she can make a full recovery with more time but we are running out of money. My family and I have put in over $3500 in vet bills the last 2-3 days and that's all of our savings.
We tried contacting gracies breeder but the calls go unanswered and it is devastaying for us.
Please if you can help us in any way it would be greatly appreciated.