If you couldn’t see a way of unscrewing it to get the old one off, how were you planning on getting a new one on?
I think my logic was the hose was making it awkward to try and manipulate the connector in anyway to figure out how it worked so I fixed that problem only to realise I still couldn’t figure out how it worked and that I’d just made things worse (this is how most of my DIY jobs go…), it didn’t help my car was half covered in snow foam at the time so I wanted to fix it asap.
AVA have replied saying it sounds like a replacement hose is due under warranty but have asked for the order details etc. first (I thought I remembered registering the warranty for it but now can’t find any sort of email confirmation, hopefully they have a record of it their end).