@microdave have you contacted Carers of West Dunbartonshire? https://carerswd.org/
They might be able to give you some advice.
I care for my Mum, but she gets 4 visits a day from WDC Carers, all arranged when she was discharged from hospital 4 years ago. Sounds like your Mum has fallen between 2 stools in that respect.
You're doing an amazing job but you also need some help and a bit of respite, all the best