Edited to correct stupid typos.
You already know he is incapable of
a business only, adult, rational conversation.
I think you're absolutely right to maintain NC. Sounds like he's enough of an ass to purposefully up the calls and emails if he knows they get to you.
[This message edited by Gemini71 at 6:35 PM, April 28th (Monday)]
Double Betrayal D-Day 7/26/2013
Two steps forward and one step backwards, is still progress.