I am currently trying to get my back fixed I have ...

I am currently trying to get my back fixed I have no disc between to vertibrae I have one leg amputated below knee and the other I've just had surgery on to fix a torn patella tendon for the third time in less than a year I have rhuematoid arthritis so I have problems healing the neurologist wanted to try one back injection and if it didn't help go to surgery the insurance is adamant I have to do 8 week's of physical therapy the doctor tried to appeal the decision but no luck there's no disc the MRI was horrible no amount of physical therapy will help it will only grind of more bone my only conclusion is their hoping I die before they have to pay for surgery