I'm guessing this movie was made in the 1990's or early 2000's (it seemed to have a SAW theme to it - do a task or somebody will die for it)
I'd looked up OCD (and movies and found this small list)
http://www.scene-stealers.com/top-10s/top-10-o-c-d-movie-characters/Sorry I have doubts your movie is in this list but maybe something may come to you.
I would like to know when and where you saw the movie.
Since your in Poland, the film could be a Polish film (maybe Italian - since the story seemed to have a gaillo feel)