Seriously need help.

Im 16 and pregnant with my ex boyfriend. He has a new girlfriend now which is whatever. We were together for almost a year and a half and he abused me for almost a year of that. I got the courage to leave 2 months ago. And he tried getting me back but I declined. Anyways, he owes me $200 but is refusing to pay me back. I've talked to his mom and she says she's working on it but I don't think she actually is. It's been about 8 months since he was supposed to pay me back. Also he doesn't care about the baby. He made a big deal that I don't tell him about my appt's but he never asks. He's never showed up to an appt or anything and I've asked him to come many times. He acts like it's not even here. Now he won't even answer my texts at all. I don't know what to do. I want my money.