I've raised £6200 to Help towards urgent operation

Hi There !
I am writing to you regarding my mum's recent surgery.
I recently received my parents who live abroad and just came to visit me in London. We had a great time.
Unfortunately, just towards the end of their trip and three days before departing back home, my Mum suddenly had an unbearable pain in the abdomen area. I had to call an ambulance, and she was rushed to the A&E of King George's Hospital in Redbridge (East London).
Upon a close examination and following various tests, the doctors discovered a 17 mm appendicitis. The hospital refused to discharge her due to the size and the nature of the pain, and she had to carry out an urgent surgery. Following which she had to remain in hospital for five nights under close observation.
Once she was discharged, she had to stay with me for another 10 days in order to recover from the surgery, missing her flight back home. She was instructed not to fly.
Later on that week, since she is a non-UK Resident, I received a letter from the NHS asking her to pay the cost of the emergency treatment that is £6234.
As you may know, this is not the kind of money someone on a low income is able to afford.
I am, therefore, writing to you regarding whatever assistance you can provide in order for me to be able to honour her hospital bill.
Please note that any help could be transferred directly to the hospital finance department.
Please find attached the hospital bill.
regards
Nabil