How can they just cut her off cold and leave no alternatives? That can be dangerous, depending on what she's on; in some cases it can be lethal. I'm all for responsible use of the health care system, but this seems a bit harsh. Also seems a bit foolish - should she die or suffer injury because she can't get her meds, I'm sure there'll be a lawsuit in the offing.
Kind of sucks for you, too. You get chewed out for something that you have absolutely no control over. She needs to call corporate if she can't or won't pay it, however, I bet she doesn't. (I don't know how many times I got chewed out by patients for some insurance issue. I'd tell them that they had to talk to the insurance company, but who's back on my phone 2 or 3 days later? And who hasn't contacted the insurance company yet?)