Background: New neighbours moved in around a year ago. They are loud, rude, and messy. Loud parties in the summer where they're out in the garden shouting until the small hours, coming home drunk from nights out and spewing all over the street on their way to their door, leaving their rubbish where it lands, whole can of paint spilled on the pavement and just left, the husband was tipping paint and oil down the drains in the street, loud music played outdoors at all hours, and so on. Anyone who complains to their faces gets told to "fuck right off" and then usually gets a follow up doorstep visit from the husband. We live in a nice area and a small street that was quiet until they arrived. Last week we had the fire brigade out to the street because he started a bonfire on the driveway (at 10am) chucked petrol on it and then went off in his car, leaving it to burn on its own. The front garden daytime bonfire is an almost weekly occurrence.
So yes, they're nobs and yes, we have complained about them as have other neighbours.
He's been working on a scrap car in his driveway since they moved in. When he's working on the car he has loud music thumping the entire time, he will go out or go in the house and leave the music going even when he's not there with it. He has tools everywhere, not just on his driveway but scattered all over the pavement too and just leaves them there for days so you have to step around them to get past. He uses various chemicals, spray paint, etc and again they're just left lying around before, during, and after plus they stink. He has power tools going, and so on. And this isn't just in daylight hours, he's out there at 10pm at times. Even when it is daylight hours, explicit rap music at top.volume for 8-10 hours straight is too much (and by explicit I mean sexually explicit language as well as swearing).
This scrap car was then joined by a second scrap car that he is also working on and is side by side with the one one on the driveway.
In addition to this they have three running cars. They drive these like utter dickheads, speeding in the street (it's a 20 zone). The three cars get parked on what used to be the grass verges in the street but are now tyre-churned mud baths where they're ripped all the grass up from parking on them. They don't park considerately on these either and will park wholly on the verge so that two wheels are on the grass verge and two are on the pavement so you have to go on the road to get around them. Or they'll park directly opposite a driveway (narrow street) so that you can't get your car on or off without knocking and asking them to move it.
This morning a third scrap car has been delivered and squashed onto the driveway with its back end hanging out and completely blocking the pavement.
AIBU to make yet another complaint to the council and how do I get them to fucking listen? I know I'm not the only person in the street who has complained and the most they do is send a letter. We know when they receive the letter because he will stand at his door and bellow "fuck you all" and then will blast his music or bang around or set a bonfire like he's punishing us all.