Help raggamuffin

Rags is 5 years old, we got her for my daughters 1st birthday and they have been inseparable ever since the day we brought her home, we noticed at a young age rags had smelly breathe, we seeked help from several vets and they all had there own options on what the cause was we were given many suggestions such as oral health biscuits, feline tooth paste, cat treats, and getting her teeth done, lately her breathe has become unbearable and yet again we have taken her to the vets (18/08/2017) we have been advised that her teeth all need to be removed as they are rotten and causing her a lot of pain and discomfort she has swollen gums her teeth are bleeding without been touched she has swollen glands and a bad infection in her gums, she has been put on antibiotics and is on pain relief, she is now 3.2kgs as she is having trouble eating food, due to low income we have been putting away money weekly but this isn't enough to cover her surgery, if anyone can donate just a little bit it would be greatly appreciated it breaks our hearts to see her in so much pain.