PLEASE HELP PEPA

Pepa and her brother Sol were rescued in Spain. They had been returned by their previous adoptee in a precarious state, starving, malnourished and frightened.  Pepa has a broken tail so we think they might had also suffered physical abuse. It was love at first sight and we knew that we couldn't leave them behind. They had only been in the UK for a few months when Pepa had a terrible accident while running in the forest. A stick went into her body, piercing her lung and getting stuck between her liver and spleen. We rushed her to a vet from where she was taken to a specialist surgeon. We did not know wether she would survive as her lung had collapsed. Before any surgery was done we were asked to give a deposit of £3,500.
Pepa made it through surgery and we were told that it was a miracle that the stick had not damaged any organs. A few millimetres each side and she wouldn't be with us.
The total bill between the two vets escalated to £9,000 that we are trying to pay. We have been given 6 months for this. We love Pepa and Sol so much and would have never considered not getting her the surgery or she wouldn't be with us today.

Can you help our lovely Pepa?