Hi DW
If you do not have caller id get it. This way you do not have to answer his calls and you can keep your phone number. It can also be used as a way of showing how many times he calls when he is to have no contact with you.
You have come so far in your recovery already and will continue to go farther. Not always easy but you will get there. You are seeing what he is trying to do and understand that he just wants his way. Like a little child not getting what he wants to so they throw a fit.
Let your lawyer see the emails so when you go to court on Thurs he fan let the judge know. The judge will let him know that it is not ok to call you and send you threating emails. They are just threats but you never know what can happen if he does not get his way.
Stay safe and take care of YOU and your children.
Hugs