How old is DD? You need to set some boundaries, if he calls drunk he doesn't get to talk to DD.
In the mean time of a court date, you need to set some rules/boundaries for yourself and DD. Maybe he can only call every other night at 7PM, without any kind of boundaries he's going to control you emotionally. Look how upset he's gotten you about mediation.
That's the game he's playing - control you via manipulation and your own fears.
Talk with the courts, inquiry about mediation, your rights, assistance when dealing with the other parent when they are alcoholics.