You should call the police about it, or at least, that's how it goes over here. There's a number like 999/911 for none-emergency matters, at least in Britland, so you can try that and explain that you have someone disturbing the peace or something. If you have mental health issues, you could use that as ammunition. Such as, if it's causing you stress and stuff, then it's unhealthy, both mentally and physically. Keep at them. Believe me, I know EXACTLY what it's like to have a noisy number. xD