If I understand correctly, you are being verbally abused by your AH, over the phone and via text, AND he is not providing financial assistance (or any other kind of assistance allowing you to work)?
Biblical counselling is not going to work with this man. He is not interested in an equal loving partnership. He is interested in having things HIS way or not at all, the children be damned.
Yes, your son deserves a father, but not one who verbally abuses his mother whenever he doesn't get his way. Imagine what he'll grow up thinking about marriage and relationships in general...
Barb is right. You need legal advice and support.