Honestly I only watched the start of the film, so the movie may not be about the salesman.
I remember it started with a teacher/couch talking about marketing( i think it was a darky scene). He was telling the studients that there was a person that manage to sell him a basketball t-shirt, without liking basketball at all, I remember very clearly that line. And then the movie makes a transition to that salesman, then start talking about sales things directly to you. Also he was at mall, (and maybe he was the boss there?).
This is the movie, thank you so much!!
– dvd1996You are welcome. I had already seen this acid film by Álex de la Iglesia, but I didn't remember it very well. It's a pleasure to help :)
– MABV