Feeling trapped and need Islamic advice - Can I turn to my father?

Assalamu Alaikum, everyone. I'm really struggling right now and could use some guidance from an Islamic viewpoint. My parents separated when I was just a baby. My older sister ended up living with my father, and I stayed with my mother, who decided not to ask for child support back then. Over the years, my father got remarried and completely lost touch. I've never actually met him or spoken to him, and his new family doesn't seem to know about us at all. On my mother's side, things have gotten really hard. Her family took advantage, taking her jewelry and property, and now we totally rely on them. We need permission for everyday things and face constant taunts. I've dealt with emotional and sometimes physical hurt. They've cut off my education, isolated me, and are now pushing me into a marriage I don't want. My mother feels she can't oppose her parents or face social pressure, so leaving together isn't an option she'll consider. My question is: Islamically, even after a divorce and no contact, does a father still have duties to his child? Do I have the right to try contacting him and ask for help with my education so I can stand on my own feet? I'm not asking for more than what's fair in Islam, but I can't keep living without freedom, education, or even basic necessities. If anyone understands Islamic rulings or has been in a similar spot, I'd appreciate your insight. JazakAllah Khair.