In the short term you need a way of solving this for yourself, which means making sure you can sleep even if that noise is going on. Options to consider include moving bedroom to be as far from the noise as possible (even downstairs), taking sleeping tablets, a radio in the background, a drink before bedtime (Horlicks or whiskey, for example), earplugs, soundproofing (thick drapes around the bed, foam on the walls, etc). Whatever it takes!
Once you're able to get a bit more sleep yourself, then you can start working on "helping" the neighbours to solve their problem ...