Brand New Leaf failed, poor response from Nissan

We bought a new tehna 2018 model last month, very pleased for 3 days ! Then Everything stoped. We couldn't even open the car except manually, the car would't start.
Our lovely new Leaf was last seen on a breakdown truck.
Nissan have been particularly unhelpful. It seems they got our money and now don't care.
We were hoping for a 2019 model for the extra range but the dealership told us we would be lucky to see one before December. This is in the UK, seems like they are shipping to Europe, guess they are making more profit while the pound is low !

Sounds like the lead-acid 12V battery failed. 50€ fix, probably covered by warranty!