I'm not sure how to put this but I really need help. I've had pnd & anxiety problems myself so I've been trying to be understanding, make allowances etc but... basically for the past few years we've been on the receiving end of a neighbour's aggression & controlling behaviour. We're aware that they have had issues with MH in the past but I'm concerned that their behaviour is getting increasingly 'not normal' & aggressive, but noone at the police or council seem to be considering this. I'm desperately trying to be rational but they are even using their car aggressively now & I'm starting to get worried for my & my dc's safety. This person has said previously that they 'hate' us but is not clear why. Basically it feels like noone in authority is mindful that there are seemingly MH issues behind this person's behaviour so nothing's going to change & we're stuck on the receiving end getting the fallout of it all. 
I'm not going into more detail for fear of outing myself, but I don't think I can take much more of this.