Cancer surgery

I have a cancerous mass on my left kidney I need to have removed I have insurance but it only covers part and they will not do surgery until I pay my part it's been 7 months now and haven't been able to save the money needed I have some but not all....that's why I'm asking for help now because it's a surgery that I really need to have before it's spreads to other places.....anything will help even if you can't donate sharing will help.