I'm sure a professional groomer will be along soon with advice - (perhaps off board if this becomes a legal issue) but in the mean time, you could have a look at the website of whichever professional body the groomer belongs to (there are several), to find out what their complaints procedures are and what the minimum standard of service is
It is unacceptable to accuse you of cruelty and neglect, and if she was aggressive and swearing at you and you were alarmed, then you could report her to the police, too (it probably wouldn't result in a charge, but the police would visit her and intervene if they felt she was a risk)
I know how awful it is when they are clipped so short - Bonnee looked like a little skinned rabbit when she first arrived with us
, but her coat grew back really quickly, and I soon managed to make her look more like a spaniel - she won prettiest bitch at a local dog show a couple of months later