Mopsey, I am truly sorry for what he's doing and saying. He's just plain nuts right now which means very irrational.
I thought he might think you and your father would gang up on him. My xh felt the same way too. It's guilt and nothing more.
As for the cc, you've tried to explain the situatiion to him, so now let it drop. Is this card in his name only? You've done all you can do to get him to help you with this cc.
As for the C, it might be best if he saw the C by himself for a while. It's too soon to even think about coming up w/a valid story for your children. Your h is harboring far to much anger right now and wants to blame everything on you and the universe.
Unfortunately, your h is going to realize that his children have lives and aren't going to be sitting on the curb waiting for him all day. That's okay, he needs to be reminded of this. Step back and allow the children to deal w/him on this one.
Mopsey, I know that this is very hard on you, but it's come to the time when you really need to stop explaining things to him. Even w/his anger, he will need to learn to connect the dots. If he wants to see his children, it is up to him to schedule the time and be there on time. Yes, you've been very accommodating on this front, but it's now time for him to act like a mature adult (I pray and hope for this).
Hang in there. He's got to swing a bit more in the trees.
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.
