C
It sounds as if they are trying to do a Paper Based Review, the call was likely from the assessor to see whether you meet the criteria for Mixing with other People. If they are able to complete the report without seeing you then the next thing you should receive is a letter from the DWP saying that they have all of the information that they need to make a Decision, hopefully in 2-3 weeks.
Gordon
Nothing on this board constitutes legal advice - always consult a professional about specific problems