@Fairyliz
It always makes me laugh when people post a problem on MN about a family member/colleague/neighbour etc and loads of posters say just talk to them.
It never works! Twatty people don’t care about upsetting/annoying other people as long as they are ok.
Agree with this 100%.
It rarely works, talking to someone about their behaviour, because most of the time, they either can't see they are doing wrong, or they don't care.
Some 22 or so years ago, (when we lived in a small 2 bed semi-detached house in a little cul de sac of 16 houses,) we talked quietly and politely to the neighbour who was joined on to us (a couple in their late 40s, who had recently moved in.) We spoke to them about their loud music, and the fact they were leaving it on for 4 or 5 hours while they went to the pub (to deter burglars!) 
They did this between 7 and 11pm 2 or 3 evenings a week!
We asked them if they could turn the volume down, as our toddler couldn't sleep. She said (indignantly) 'well we were robbed in our last house, so were HAVE to keep the music on when we're out.' HE said 'we will try to keep it down then!'
The music went down, and then a week later it came up again! Not only when they were out at the pub, but really loud music at 11pm, when they came back. Thudding and thumping through the walls til 1 a.m!
We asked again (the next day) if they could stop playing it so loud, as we have a toddler and a man who does shift work, and we can hear the thudding music all through the house! HE answered the door, sighed, and said 'ok then......' then rolled his eyes.
The FOLLOWING week, the music came thumping through the walls on a Wednesday night at midnight! It was quiet til then, and then the music came through the walls. Me and DH went next door and knocked, (at half past midnight!) and they refused to answer. So we sat up with our toddler until 2a.m. when the noise stopped, and went around to them the next morning.
HE answered the door, and sighed, and rolled his eyes, and said 'we really should be entitled to do what we want in our OWN HOME.' DH said, 'well you can't. Not when you are joined on by a party wall, to a neighbour. You CAN'T play loud thudding music until 1 or 2 a.m. I am not saying that, the LAW says that!'
Then we heard HER shout from the back 'tell those nosey cunts we will do what we want in our OWN CUNTING HOUSE!'
Nice. 
HE slammed the door in our face.
Next time it happened, we called the police. THEY asked them to turn it down. And KEEP it down.
They did. But the evil looks they gave us after this, could have turned the sea to stone. They were purposely loud and lairy in the garden during the next 2-3 months after this, and had some 10-12 people around at least twice a week, and kept making loud comments about their cunty neighbours, and making sure rubbish/beercans and all sorts, came over our fence.
It became so unpleasant, that we put our house on the market and moved. We were gone nine months after the first confrontation.
Hilariously, we heard from an old neighbour in the cul de sac, that the people who bought our house - a 30-something biker couple - had up to 20 people around once or twice a week, having parties in the house (and garden.)
Apparently, the old (horrible) neighbours of ours had had a few nasty rows with this couple, and 10 months after we moved, the horrible couple who were next door moved out. You reap what you sow!