I've been thinking about this because there's was pretty big Indian population in my previous neighborhood, and so of course my family is friendly with our neighbors. Although your instinct in the moment is understandably to be irritated because you can't sleep, I wonder if this is just a cultural misunderstanding? Perhaps honey instead of vinegar approach would work?
I write this because the family from India who lived near us was horrified and immediately changed their behavior when apparently they got a letter from the community HOA board (not because of me, I don't care and tended to ignore any letters I got because a couple of years our HOA board was run by nutters.) They wanted to fit in and did not want to be perceived as bad neighbors. Crazy as it sounds, I doubt that the people throwing these parties realize they are being bad Canadian neighbors. I've never been to the country of India, but I have frames of references of cultures where very loud music until 4 am is considered pretty normal depending upon the occasion. Havana, South Beach (Miami), New Orleans, and Prato, Italy, where I kid you not there was an impromptu marching band going up and down both the main streets and little side street until the wee hours every night we were there. I don't know if it was some sort of festival week in Prato or what, because I've never seen anything quite like that, but I kind of got the vibe that dressing up to go hang out on the little streets and people watching and having random bands walking around was the vibe in the neighborhood. I've heard of similar situation in parts of Portugal as well if you are in a certain neighborhood at a certain time of year where there are months long parties all night. Of course most of the neighborhoods in these cities are quiet at night, but the "party zone" is the party zone, and everyone just seems to accept it as normal. And I think some cultures also accept that a random celebration party like a milestone birthday or wedding can be very loud for very long.
In my previous neighborhood with the bigger Indian-American population, there were some GIANT parties! I went to a party for a one-year-old boy that was the biggest house party I've ever seen apart from another wedding with 500 guests. The birthday party had enough food to feed everyone attending for a week. The music was blaring at various parties, but not so loud we all hated it and not late into the night . . . the latter may be because my city does pretty aggressively uphold noise ordinances; even concerts at the concert venues are definitely over by 11 pm.
My point is that the volume of the music is more likely an issue brought by the company that owns the DJ/drummer company, who are obviously deaf. If you start becoming close friend with the families and actually get invites to some of these bashes, then you might have more influence on the hosts that what they are doing is a bit counter to Canadian cultural expectations (to be diplomatic about it).
