What can I do about ignorant neighbors?

An officer just came at my door and told me that one of my apartment neighbors (one i share my room adjacent to) filed a noise complaint on my household. This is the third time this year that this had happened. I play music in my room most of the time and it’s usually soft or classical music and always under 35 decibels (as measured by my amplifier).
What irritates my old parents and I, is the fact that they have no respect for us. We celebrate a traditional Chinese New Year with our family with a respectable noise level and they call the police on us.
When they have parties, it is usually outdoors and they play loud music, gamble in their patios (which is right next to my parents bedroom window), even urinated on our garage door one time, but we at least came up to them in person and told them to ease the party.

What I’m trying to ask is how to deal with these kind of neighbors and avoid getting another fine. I’ve tried to talk to them about it, but they did not directly respond and were apathetic.