Sorry to hear all of that but at least you’re mostly OK.
Document everything sounds like this will end up going legal. Every ache, pain, every painkiller. It can take several days for injuries to become obvious. When I was hit from behind I was fine but over the next few days I got more and more pain.
If you’ve hot receipts for everything damaged keep them safe if not get quotes on replacing
I’d never encourage anyone to lie but do ensure you keep in writing every last ache, twinge, headache, thing you can’t do, anything you miss doing.
That’s exactly what happened to me non motability car little old lady straight thru a give way t boned me.
First thing she said was I didn’t see you I was driving a bright red mondeo estate on a lovely clear day and no other traffic. When I told the guys down the local petrol station they said what’s her name so told them, he laughed shouted pi lads to the workshop guys, Oi lads Dorothea has done it again. Then said to me she crashes that car every day. Really needs to be retesting after a certain age
All the best