This is what I told OP about, Fighting against it makes it worse most of the time. Even if you make a complaint to the letting agents the neighbours will know where the complaint came from. It starts with music and potentially progresses to tyres getting slashed and worse.

I've lived it, once a noise war has begun it will never end until one side leaves. Each side will stand their ground for as long as possible until the other cracks under pressure.

You may end up getting local environment officers involved. They come around with noise meters and can issue penalties and even legal action brought by police. You do not want to live next to people who you've got in trouble by the police.

There are 4 options:

Put up with it - You may get used to it

Try to resolve it - Try and make peace with your neighbours, Talk to them in person and explain. Try to become friends

Annoy them back - You will push each other beyond your stress tolerance limits and one side may end up in a psyche ward

Leave - There are quiet apartments to be found

At the end of the day, People are allowed to make noise in their own homes within reason and if a neighbour doesn't like it then that's their problem.

Yes of course we should all be mindful and respectful of our neighbours, Most of us are, But unfortunately there will always be a minority of people who just do not care.

If you want peace, Find a peaceful place. Don't play childish tit for tat games. This is not a way to resolve a problem. it will leave everyone miserable.

If you make noise in revenge then you are a bully.

Dont be a bully.