I also hope you didn't call him. Calling him merely gives him your power, so don't do it!!! It is childish of him for having blocked you and cut off attempts to mediate the settlement. If I were you I would simply draw up the settlement that works best for you and present it to the mediator.
On a lighter note - I'm leaving for OSU country in about three hours - wish me luck in the enemy's backyard. Then on Monday it's off to the Great Lake State of Michigan!
