If a neighbouring housing society is repeatedly causing disturbances with loud DJ music, even late at night, there are several avenues for action. You can report the issue to the society itself, and if that fails, escalate it to the Joint Registrar or Registrar of Co-operative Housing Societies. Alternatively, you can approach the local police or civic body regarding civil nuisance, as there are legal limits to noise levels, especially after 10 pm.