There actually is a really awesome tool you can use to solve your problem, and the best part, it's absolutely free.
The tool is called "go talk to your neighbor"!
It works really well. All you do is walk up to the door of the two other renters, knock, and when they answer...describe the issue you're having and ask if they might be able to work something out with you. It's possible that neither of them are actually downloading anything...maybe one of them has a virus that's going out and spamming people late at night. Help them get rid of the virus, and they might even bring you some baked goods or something.
Human interaction is cool.