Toxic mother

I’m in university and live with my parents. They pay for everything and are constantly threatening to take away the financial support for various reasons. They r the only reason I can afford to continue my post secondary education. My mom is so toxic tho. She is always saying hurtful things to me. And I try to nicely tell her hey that was rlly mean and hurt. And she says either that it wasn’t mean. Or that I should have better control over my emotions and not let her comments affect me. Sometimes she just blatantly doesn’t acknowledge me when I talk to her for no apparent reason. I’ll say hi to her and she will just walk away. I can’t move out without putting myself in insane debt because I can’t work when I’m in school therefor can’t pay for rent or groceries, they would stop paying my tuition so I’d have that one too of it which is like 15,000$ a year. But I don’t know how to do this anymore.