Nearly a year waiting for work capability assessment?

Hi

I'm new to the site but would be grateful for any information or advice you can provide.
My partner moved in with me in October 2019 following a deterioration in his health due to an accident.  We put in a joint Universal Credit claim reporting with continuous sicknotes from April 2019 to the present. He was employed for 20 years in the same job but they dismissed him on capability grounds February 2021. He hadnt received any income either from work or benefits prior to Oct 19 as his statutory sick pay ran out a year before. He was granted high rate PIP on a face to face assessment.
We returned all the work capability forms back in March as soon as they sent them and were told he would get a telephone assessment. We are still waiting. I've chased and chased and been told it may not even be this year.

He is unable to work. Gp and consultants agree. Pip agrees. He is housebound and requires a lot of care. But we can't get the assessment to qualify for the disabled element of Universal Credit which would help pay towards his care. When I queried the delay they said there is nothing they can do it's due to Covid. I said I wanted to complain and they simply advised me to write in.  I can't see how it can be right that disabled people are left in limbo waiting for assessments?  It's 10 months since we first applied for UC.

We get work review calls from the job centre every couple of weeks asking why he hasn't had his work capability assessment yet?!   

I'd be really grateful if anyone could suggest anything.  Many thanks