Friday night our neighbour had a big LOUD birthday party in her garden, professional caterers, cocktail van, DJ, a lot of people. We live in a new build estate, all very close to each other and 80% of the people living around us have babies and children under 10. It was so so very loud that in our house, with all the triple glazed windows shut, it still felt and sounded like we were in a night club. Our little kids were up til midnight, the youngest crying in tiredness. But we let it go, (even when it got to the drunk screechy singing/shouting phase at 11:30!) as it doesn't happen very often, people are allowed birthday parties. We just felt a bit put out as normally everyone in the community is lovely and considerate and if there is going to be a party they come around and warn each other and make their apologies before hand etc. Not this lady. 
Then: Sunday afternoon, starting about 3pm she has another party. We think, hopefully it's an afternoon thing, as again, she has god knows how many people in the garden (another neighbour counted 30 as their loft room looked right down into the garden), along with very loud night club style dance music pumping through the estate, etc etc.
We were getting really annoyed when again the kids couldn't get to sleep and we couldn't even hear our own tv so at 8pm I went around and I really really nice wished her happy birthday but said, please switch the music off now please, and told her I can't have another night of crying babies/children, and considering her location, surrounded by other families could she be kinder?
She turned it down slightly, for half an hour and then it got louder and louder again. We reported to the council noise line, they did nothing. Police Corona reporting line (for gatherings over 30), they did nothing.
Quite a few of of my other neighbours were all whatsapping each other bitching about the noise but no one else went around.
Was I the party pooper ask her to STFU (very politely) or is this just something you would accept living in this sort of location?
But more importantly - the question now: Would I be unreasonable to play Peppa Pig music on full blast at 5am outside her bedroom window tomorrow? (I wish I had today but we were exhausted) 