Tough- but your friend brought it on herself.
Correct. My warning was ignored, and I gave that warning after the first treatment or consultation happened last year. I think I said, among other things, "He sounds like a dodgy BS'er to me. Find someone else!"
You could report it to the dental council, however you'd need proof.
I know, seems there's not even a receipt. There might be X-rays but not sure how it can be tied in to prove the dentist did them and the rest of the work.
Additionally, he usually runs very late and a wait of 1.5hrs to 2 hrs in his surgery is not unusual. About 800zł has been wasted on him, perhaps a little less. The total he's received has been over 1000zł.
For all that, my Polish friend still kept going to him, convinced perhaps that such lateness and popularity was a good omen. Kinda reminds me of empty nightclubs that deliberately make a queue form outside.
It has overtones of someone in an abusive relationship who just seems to stay there for no known reason.
Moral of story for anyone in Wroc browsing the forum: 95% positive internet reviews of a dentist (or any trader) don't always mean anything, people can even fake them, and a busy waiting room might just mean people keep having to come back because the dentist messes up or keeps making fresh work for himself. If he doesn't issue a receipt, it could be a big, fat red flag. If he says anything like "Trust me/leave it to me I know what needs to be done/I know what has to be done don't worry" you might want to consider putting your coat back on and leaving the surgery.