My mom didn’t want me back then. Do you think she’ll want me now?

She left my daddy and I when I was 7-8 years old and never came back. 2010. I would cry for my mom every night when I was little. My dad flat out told me that mommy wasn’t coming back and she decided to leave us. I didn’t understand why she would leave us. I cried and threw a temper tantrum. I cried to my brother and sister that I wanted my mom! They were already grown (then 27 and 23). They have their mother (my dads ex wife).
All my life I’ve been trying to call my mom all my life but she kept hanging up on me. I still do and I’m almost 18. She never picks up the phone. I wanna know why she really left us. My aunt stepped in to take over the motherly role. I do appreciate for what she has done, but I want my MOTHER. My dad kept telling me to move on with my life and stop dwelling on the past. When I do, he snaps me back to the present. He wasn’t having any of that. He said, “I’m not going to LET you dwell on the past. Not in MY watch. No! I’m going to be on you about that. Your aunt has be more of a mother to you so stop making your mom gifts and give it to your aunt.” I live my dad but sometimes he’s too tough and a little mean. My brother and sister told me the same thing and to stop dwelling in the past and act like a young adult. My aunt would take me out so I won’t sit on the house all the time. My dad said I needed a female role model. I do have one. My sister! She was like a mother to me too.