Urgent operation for our pet dog needed

We dearly love our dog, she has an infection in her leg and desperately needs an operation to repair the tissue, however we stupidly cancelled our insurance due to the cost and trying to cut some expenses. She is currently in the vets on a drop and antibiotics until we can give them the go ahead to do the operation, if we don’t do it we will have to have her put down, we are devestated. We have already borrowed money to have her scans and blood tests and vet care paid for. They won’t do any more without being paid for upfront. We cannot get a loan unfortunately we have tried every avenue and we just love her so much and can’t bear the throughly of her not being around. She is part of the family and I’m so angry with myself we are in this situation and I can’t find this myself. Please if anyone can help a little and donate towards the cost we would be forever grateful.