|I'm really sorry. Did you fall behind on a payment or something? What is their reason for canceling?
I'd suggest that if they do not cover the stimulator, work out a payment plan with the doctor and still get it done. I don't know if you could get it, but when I went in for my knee, I applied for "CareCredit". It is a credit card that is solely meant for medical expenses. There is no interest at all if you can pay it back within a year. After that, it will start accruing interest. It is also good for dentists and for vets.