My sister was at a boarding school just 3 years ago and exactly this happened when she broke her ankle - the school nurse told her to get some paracetamol and sleep it off. After seeing the picture of it I had to ring them up, demand that someone take her to the hospital for an x-ray, and they of course sent us an invoice for £50 for "transport to the hospital" anyway. Nothing happened to the nurse even though I complained higher up as far as I know.
Possibly, I just didn't know this was an option at the time, I only complained with the school. And I really have neither the strength nor the conviction to do it now, it's water under the bridge as they say.
