I want to leave my mother

As I just starting to learn about Buddhism and the methods of be free from samsara. I have confusion about my relationship and my mother. I am 24 yo now- I feel like I have enough of being used by my mother. When I was 1 week old she gave me to another family to look after. She paid them tho. She never taking care of all my siblings inc me. She is sex worker and my dad was a lazy man who did nothing but spend my mother money. Instead of saving money for her kids, she went to another island with young guys to spend the money from properties etc. she sold me (not technically) to 50yo man who is her client,but he didn’t know that I was her daughter. She asked me to go there AGAIN after the sexual assault happen a day before, just to get a phone that he willing to give for an apology of his behaviour, but he did it again. My mom laughed and disgust when i told her what happened. When I started to build up my life on my own, she know I have more money than all my other siblings so she asked me to send and give her money(weekly or monthly). The money goes somewhere, I dunno where but it’s a lot for food expenses. Now I am in Australia studying with my hard work and she still depend on me to live, just like what she did in her whole life. Instead of giving up on her, I show her the good path n to become a better person but she always says “I was born like this, it’s a habit, don’t tell me what’s wrong n right, cause I know” over and over again. Last month, she asked for my help and I don’t have anything cause I just pay my school but she doesn’t understand so I asked my friends for help, and she said “it’s embarrassing to have a daughter who live in another country, but can’t support her mother” so I just said to her,”enough, enough doing this to me, if you believe what you believe is right then keep doing that, but I don’t want to be part of it” and I never call or text her since. I truly don’t want to be in her life anymore, she is 50yo. She had 3x stroke and she stil doesn’t changes. I accept the way she is but I don’t her to be part of my life, I don’t care if someday I live on the street again, as long as she stop to using me. What should I do ??? Try again ?? I forgive her. Should I back and apologise because I choose my happiness?? I need a spiritual answer ! I’m lost.