Sorry this is so hard, hope you can get someone you trust to be there with your mother for the presentation. Can you prepare a list of questions with your Mum for her to ask and write down answers? Then have time to think about them.
Suggest she does not sign anything on the spot, but has time to discuss and see it all in writing, with time to discuss.
They should send her final forms by post or online or preferably both, suggest to her to ask for both then she can forward the online one to you and you could follow together any questions or concerns to be asked. With paper it is easier to highlight or scribble notes etc. Do not let them rush her, although I realise help is needed urgently. Did you manage to approach an org like ADACAS ? They should still help with dealing w provider for her, even directly to raise her queries, until it is settled.
It is hard and the paperwork and admin is horrendous, but once finalised w a good provider it should be worthwhile.🤗🤗