Depends on what exactly you want. Locate the guy, pay child support, make sure said deadbeat stays away, or some matter of revenge?
Unfortunately you might have to accept that's who he is and he'll have to decide to change. I have a friend whose sons biological father is useless. Her son is 9, and the last time he saw his father he was 7, and his father left him with his grandparents so he [the father] could get high with his friends. Luckily my friends boyfriend stepped up, but sometimes that's life. You can't control another human. Magick can persuade but ultimately each person has their own free will.