The key is "DOING WHAT WORKS". The best thing to do is listen to all the advise. Then pick the thing that feels the MOST UNCOMFORTABLE and do that.
Other options: Can you stir his emotions? Let him show up and wait for you. Wait till he calls you. Answer in a noisy place with people laughing. "Something more important came up".
Let him show up and wait for you. Wait till he calls you. Let it go to VM. Completely ignore him. STIR HIS EMOTIONS.
By delaying your response. Who will he be thinking of? Let his imagination go wild.
"What is best for my kids is best for me" Amor Fati Link to quotes: https://www.divorcebusting.com/forums/ubbthreads.php?ubb=showflat&Number=2879712