This is a tough one – and even tougher to prove, I would imagine.
We recall your prvious posts and this is a long-standing feud (I think) over dumb waiters, lifts and electricat power boards.
I reckon you have two options; you could take action at the CTTT on the grounds of noise and behaviour on common property or you could go for an apprehended violence order at court.
I don’t know your chances of success with either so perhaps your best bet is to send a note saying: “Look, you hate me, I hate you, forget about revenge for all the things I haven’t let you do and let me sell this place so we need never see each other again.”
That isn’t only the cheapest option, it might actually work.