Bloody hell, why is it that common sense has disappeared out the window?
Fullylucky - this is not an international incident, it is not even about race.
Just go talk to them, they can't do anything about it if they don't know there is a problem.
Be an adult and go talk to them.
Great advice... and if they ignore you, then call the police when they do this night after night. It actually is not even a matter for the landlord, but if I was their landlord, I would want to know and I would not renew their lease.