(uk) I'm so tired of my neighbor in my shared accomadation, reporting him didn't work. What do I do?

I keep getting into fights with my neighbor because he keeps smoking weed indoors, keeping me up all night with noise (door slamming and playing music) and he keeps going out of his way to piss me off. Things like pretending to smoke in front of by making a sound with his mouth or just lying about random things constantly. I haven't slept properly in over a month. Lately he's taken a habit of implying I'm mentally disabled in a lot of our conversations, eg saying I need to go to a care home. He knows I have OCD and has done stuff like blow smoke in my face before saying "You're gonna get high".
He KNOWS I have misophonia, and has done things like leave the house with music playing so I can't so much as ask him to turn it off. He literally just does shit to harm me for no reason.

I've reported him to management for all of this. They haven't done anything and on the door slamming in particular they actively take his side. What do I do? I just want to sleep.

Before you say anything, I use earplugs, earphones, brown noise, and I ask him to stop slamming very often. He lately admitted he was lying every time he said he was gonna try and stop.