Sender Unknown (1995)

The story of an older man living in the floor below a young woman's flat, where he must endure all sorts of noises and loud music from said woman and her friends. We get to see her romantic choices in men and the old man's crusade to make her stop partying in such a noisy manner. As a result the young woman starts a prank that causes the older man that hated her in the beginning to care for her, leading to an unexpected outcome.

I found it slightly reminiscent of Patrice Leconte's Monsieur Hire (1989).

Not the best sample of new Mexican cinema, but not too bad either.