My company ABC is a vendor for another company XYZ (so ABC is a client of XYZ). XYZ also has another vendor company DEF. I needed some help from an employee at DEF for a project were both mutually working on for XYZ.
Problem is the person from DEF was not very helpful. They did not get me all the information I needed to solve some issues I was having with their software.
How can I tell my contacts at XYZ (our mutual client company) that this person at DEF was "not helpful" and that they should help me find another person at DEF who might be able to help?
My email to them currently looks like "do you know of a technical contact at DEF who could help. I already brought this to Hanley, but he was not helpful". I am basically looking for a nicer and more professional way to say those last few words.