This sounds so stressful for you.
Do you have an Anti-Social Behaviour Officer in your Local Authority?
Ours is fantastic at helping with this sort of thing - she works in partnership with the police but, because it's her that's involving them, not you, it means you won't get brushed off with "It may have been an emergency" sort of stuff.
You should be able to find out if you have one through your LA website. Apologies if this has been suggested on one of your other threads.