Hi

I don't know what state you live in, but I would imagine it's the same way in every state. Once you have a lawyer, the opposing party can't make direct contact with you. They have to go through your lawyer.
When my ex was trying to change visitation rights, I found this out. He'd try calling me to intimidate me. My attorney advised me to tell him "Talk to my attorney" and then hang up on him. I think it was Dexter that told you "Don't take the bait." He's very right! Don't listen to a single word your ex says to you. You already know it's going to be lies. Don't listen! If he tries it in court, the judge will tell him to "Sit down and shut up!" LOL If your ex doesn't, he'll be making an *** out of himself and it will go against him.

Show everyone, including yourself, that his behavior is beneath you and don't buy into it. Stick your nose in the air and ignore him. Let the attorneys and the judge take care of him. hehehe
No doubt, you have a lot of anger built up toward you ex. Use it in a good way by focusing on
your behavior and make it exemplary!
Lastly, I probably shouldn't be saying this, but if you carry through, you'll be driving him NUTZ at the same time.

"For unto us a Son is given..."
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Psalm 119:105 Thy word is a lamp unto my feet, and a light unto my path.