"Rude staff"

I had a backslab applied one evening for a dislocated elbow and overnight it became so lose that it could be pulled off with ease, returned to a&e and seen by an extremely rude nurse practitioner who said I must've moved it or got it wet. I explained that I had moved it to get a drink without thinking and she carried on belittling me like a child that I must've moved it or got it wet. I said I'd already admitted to moving it in the night but this wasn't enough she then insisted the cast was soaking, the only way it could've got wet was from the rain which is ridiculous. She proceeded to cut the cast off and said that she had a good mind not to put another one on- which in fact she didn't! I will not be punished like a naughty school child and left. Even the receptionist asked if I wanted to see another nurse instead but by this time I'd had enough.