Constant Banging From Upstairs

I think the answer will be sucks to be me but here goes.

My new neighbours who moved in upstairs at Christmas have a child who "likes to bang" their words when asked if the banging could stop.

It is like a child kicking the back of your airplane seat but starts about 7 in the morning and stops about 10 at night with a break between 9 and 3 which makes me think it is a school age child doing it.

It is so loud my downstairs neighbour has complained to me twice about it and I've explained it isnt me.

They removed the carpets which doesn't help.

Google searches indicate a child is entitled to make as much noise in their own home as they like. Playing, shouting and running around wouldntt be so bad.
Karaoke is quite tough tho.

I have lived here 10 years and most tenants dont stay long and some are very quiet. Soundproofing is good enough we can't hear conversations or TV but this tenant we can hear on her phone she is so loud but the banging is driving me mad. It vibrates through my sofa and makes me feel sick. I can't even imagine how a child can be so loud or how he is doing it. It is very fast banging makes me think it is feet.

Parents say he likes doing it so won't stop him. What can I do apart from move which is very drastic and I can't afford it
Tia
Amelia x