So sorry to hear this.....& I understand how fighting like this makes the usaual stress so much harder when it's so unnecessary.
Do gather your courage & get this in motion (I know - easierr said than done when it's made you feel so low)
There's some good advice on this thread. We have a local lawyer here who specialises in free 'action' \& welfare rights, & she sorted many things out for us some time ago. She actually deals with mental health problems mainly, but does other work too. I think a registered charity may be a good place to start, as they will listen properly to you, & tell you how to go forward.

Hope things get sorted really soon
Hugs
Jackie x