Help my lovely mum pay for her spinal surgery!

Hi everyone, my name is Jessica and this is my mum in the picture, Fatima. She started feeling pain and numbness on her legs about 2 weeks ago and went to the doctors for a check up. Turns out her vertebrae C4 & C5 are compressed (confirmed by Dr Edgar) the spinal fluid is not able to pass, resulting in a graduate loss of feeling in her legs and arms. It’s called Cervical Myelopathy. Today, the 17th of August 2023, my sister Juliana took her to another city back in Brazil, where my mum lives, to confirm the diagnosis. It has been confirmed by another doctor, Dr Marcelo, and he informed us she has to take the surgery straight away. If we don’t, she will not be able to walk anymore. For those who know my mum, you know how hard this would be. For those who don’t, she is an extremely active lady, she is 68 but has the energy of a 35 year old. The amount in reais, Brazilian currency, is $47,044, which converts to, as of today, AUD$14,924. As my mum does not have a profession (she gave it up to take care of me and my siblings), she is not retired and doesn’t receive any aid from the government, with both my parents relying on my father’s retirement fund. They do not have the amount needed for this surgery and, unfortunately, they can’t pay that into more than 3 instalments. Please help me to help them, so that she can take the surgery they couldn’t determine for sure what caused it, but my mum was diagnosed years ago with fibromyalgia, which happens to bring pain and numbness, leading the doctors now to believe she was misdiagnosed and may have been suffering from this compression for a long time. Thank you very much in dança e; my parents are my treasure, and I would appreciate, from the bottom of my heart, any help you could give.