Maybe it could be done via email which is the point of this blog, but I never had the confidence to try that.
For reliable and specific matters using calls is unfit for the purpose. I avoid talking about those as a primary medium, being only suplementary. Something not written down never existed in the end.
In matters I do not know to the slightes, where to begin with, talking to a person is better starting with. Then after getting my bearings step back to the reliability of written words and written discussions and written agreements and such is the way.
And those insist on speeking instead of providing written info is a big warning sign about something fishy (intent of misdirection, incompetency, cluelessness, confused internals, ...) is hiding there.