Hi Pelly
I'm afraid your question is outside the remit of this forum, and is in the hands of the DWP and what they will or will not accept. If you have a third party assisting you, they need to contact the DWP on your behalf and explain your circumstances to determine what they will accept. I can't tell you what that might be, because we don't know what they do, if a claimant fails one part of the check - other than saying they normally insist on a home visit (which you have already said isn't possible).
BIS
Nothing on this board constitutes legal advice - always consult a professional about specific problems 
