Trusting,
He is punishing you for your email advising him not to post to you at work. He's acting like a spoiled two year old.

I'm very sorry that he's taking it out on your little one. Is there any way that you can take her? I really would love to ring your xh's chimes over this.

Sit quietly, the answers will reveal themselves when you least expect them to.
The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.