Mamba's surgery and recovery

Mamba is an 8 month old black lab and German Shepard mix. She was recently injured falling down a hill and suffers a left femoral fracture on her back leg. We took her into a hospital and went through multiple surgeries which has all failed to save her leg. In the span of 2 weeks Mamba has been going through a lot physically and mentally. She has gone through 4 unnecessary surgeries and is now getting service from another hospital . They noticed from all the failed surgeries that her repairs will be very costly. We are looking at amputation or a very costly repair. Any help or donations will be very helpful for this tough time. Thank You