I am sorry to read your post, I know its hard not to take these hits personally, try hard to detach from the spew and hurtful things your h is doing, they are coming from the MLC monster within right now.
Your m is your side of the family, his guilt at what he has done to you and your d could be a reason he can't face her. Dismiss it and try not to analyze everything he does or does not do, it will drive you crazy trying to figure it out and to be honest it is a waste of your precious energy that could be better spent of looking after yourself.
The more you detach and allow his antics to wash over you the less you will be affected by what he is doing/saying.
Is there any possibility of calling the phone company and explaining the situation, they may be understanding and help you out, separating your phone out from the others and sorting out a better payment plan for you.
Haunted you are doing great, I really hope that you get a break in this crazy ride you are on soon. Hang on in there and look after yourself x