I don’t know if my description will help and I don’t know any of the actors names, but we’ll give it a go
British film, watched on Netflix a few years ago. The story is about a teen girl, lives with her young brother, she gets involved with an older man who owns a pawn shop or similar, and has a reputation of going for younger girls. Makes friends with a rich(?) girl about her age, who I think likes to get into trouble, and it turns out the man is her new friends dad. New friend then wants to shoot him, as he’s never around to be her dad.
I actually want to find a song from the soundtrack, but I can only remember the tune to the song nothing else. I am sure the film name is something along the lines of dementors/destroyers (but not that)
Anyone?