Hi El Dee
You are correct that if you do not return your form then DWP will close your case, but as in your case there are exceptions.
DWP do offer this service, they even do home visits, but due to Covid this stopped but it is starting up again, I was speaking with DWP a few weeks ago on this very subject.
For those who cannot get any help then it can be a good idea, I don't recall hearing thing bad, not yet, for claimants who get help from DWP case workers. I have come across a number of claimants who have had a positive experience.
My advice, if you want help from a DWP case worker be open and honest about how your condition affects you. I would also read our guides before the caseworker phones you and have a list of your conditions, dates when first started, is it ongoing, any medications and any side effects from the medications. PIP Claim guide
www.benefitsandwork.co.uk/help-for-claimants/pip Gary