DAX expression to link 2 tables virtually linked i...

Hi All

Hoping you can help

I have got 3 tables, "people", "directorate" and "volunteers"

If I was to display all 3 in any order that it would work no problem

However, when trying to show linkage between "Volunteer Count" and "Directorate" only I get the below results

Since I am unable to change the model (due to working with life PowerBI datasets) and can't use CROSSFILTER to the volunteers table (Because Count Volunteers is a separate calculations which also exists in the life source and I can't manipulate it)

I was wondering if there is anything at all I can do on visual level with DAX calculations to force that link? Or does it have to go back to engineers?