Hi OP.
There really isn't much you can do that others havnt suggested already. Just be vocal and persistent in phoning the council EVERY TIME.
On a side note, I have a neighbour of the screamy bangy generally hell type (3am rap music, spends the first hour awake screaming "F off and C**t" and the walls. Pretty sure it's MHP but the could just be a douchebag. My room is next to thiers in the house over and the old walls are not very good at sound insulation :(
I've found these cut out almost all of his noise and let me get some sleep at least.
Ear Plugs for Sleeping by Beary... https://www.amazon.co.uk/dp/B07JGJ9LH2?ref=ppx_pop_mob_ap_share
I hope they can be of some help to you.
Good luck :)
Try Silicone based ones- something like these (https://www.amazon.co.uk/Best-Plugs-Sleeping-Beary-Quiet/dp/B07JGJ9LH2/ref=sr_1_5?crid=UQT7SNCE779H&keywords=beary+quiet+ear+plugs&qid=1658939675&s=drugstore&sprefix=beary+quiet+ear+plugs%2Cdrugstore%2C54&sr=1-5)
You can mould them to your ear shape, don't be afraid to pull them apart to make them smaller for a better fit, a small bit at a time to get them down to size. They've helped me get through a room full of people snoring in a hostel, I swear by them.
https://www.amazon.co.uk/dp/B07JGJ9LH2?ref=ppx_pop_mob_ap_share
These. They are made of magic and sleep.