This happened to my MIL, but it make my brain hurt.
A few years ago, she was scheduled for a hysterectomy. They live in a very tiny rural town, so for major medical things like this they drive a few hours to the next state, where the closest big hospital is.
So she checks into the hospital, gets prepped, goes to surgery. When she sees the doctor post op, she's told that they opened her up but then 'couldn't do the surgery'. Why not? Well, they just couldn't. And that's the only answer the doctor would give her.
I can't believe that a) any semi-ethical, semi-competent doctor would do such a thing and b) that MIL didn't start making a huge noisy fuss until she got a real answer. If that didn't work, I know that my first call would have been to my insurance company's grievance line - nothing irks a health insurer like being billed for services not rendered (aka fraud). I encouraged her to do this but for some reason she didn't want to make a fuss.