Don't pay for authorization given by the call centre

Bonitas first refuse to pay for an authorization dr visit, where I especially ask for the authorization for the dr appointment. We then went and saw the dr, and then my trouble started. After 5 months of phone calls, they finally agreed that they did give me an authorization number to visit this dr and that they will pay it. I also ask if they will pay it out of the right benefit account and not out of my savings that they promised that they will not take it out of my savings for this year because it was a claim for the previous year and out of a benefit account. So when they paid it, guess what they paid it out of my savings account for this year. Now I don't have any savings available and call after call they will investigate and they just refuse to reverse it now. This is the worst service I received and you can't rely on what the call centre personnel tell you when you phone for authorizations. I have recordings of the conversations that took place.