Oh I feel your pain...been there, done that and was thoroughly ticked off.
I had specifically TOLD one groomer...do NOT cut any of the hair on Reggie's head. None, zip, zero. I don't know how this was misunderstood...because I said it repeatedly.
And she did it anyway.
She got an earful and lost my business.
I hope she didn't trim at bridge of her nose too.
You can expect it to take a year to grow back.