I saw this black and white movie 15-20 yrs ago about a concentration camp on late night TV. I remember it to be old and had sub-titles in english. One of the main plot lines was a woman collaborator with the nazi’s running the camp, and the others who hated her. I do believe the end showed her helping the other women and maybe getting killed for it. I hope this rings a bell with someone. Very powerful movie.
https://www.imdb.com/title/tt0052961/?ref_=tt_urv