I've raised £2000 to Help my cat, Pishi, walk again. She needs a second surgery.

My cat, Pishi is a 2 year old persian cat, living with my partner and I and her twin brother. she is not insured as we could never imagine anything could threaten her life, until...
On 2nd of June, just before the midnight Pishi fell off our window on the 6th floor.
We were so lucky to realise that she has fallen down by my other cat’s reaction and managed to get to her on time to save her from a fox! We immediately took her to the “Queen Mother Hospital for animals RVC” in Hatfield To find out that
she has broken the 2 back legs, fractured 4 teeth, bite off one forth of her tounge and damaged her lungs.
We’ve been told that the costs of the treatment and operation will be £6,000 or we could put her to sleep... That is a huge amount of money but she is so loved that we have managed to gather £6,000 to go ahead with the operation and save her life. (screenshot of an invoice (paid) of £5,396 is attached).
After examining her and taking x-rays, she has been booked to do a surgery the next morning which they had to postpone to the next day because of the amount of air that has built up in her chest and was stopping her from breathing normally and deeply.
She has had the operation on 4th June by Rhiannon, a lovely orthopedic surgeon, and recovered rapidly to come home on 9th June. Everything at home was ready for her to be safe so that she could have an easy recovery.
But unfortunetly her left leg which were put together with the help of plates and screws has let her down. It became very swollen (photo attached) and painful for her to walk on. She has gone back to the hospital today, 15th June, and is booked for a second surgery. This will cost of another £4,000 which we can‘t afford!!!
Please help us save her and help her walk again, any little donation can help and will be highly appreciated. I have attached photos of her and the invoice of what we have already spent.