I would go down the police route in that case. Bullies tend to rely on people not seeking help. A visit from some uniforms may well do the job. But get all the neighbours involved. Strength in numbers and shows the police this isn’t a spat with your neighbour but community issue.
Exposing their...
Well. There’s the official route;
Record on phone, keep evidence of your polite requests, keep a diary, report all incidents to 101 via email, report to council.
The most effective route;
Get three or four of your biggest mates, face masks on and go up there and scare the shit out of them...