Before I get started, I am on mobile. 

Jumping right it to some background. I (19f) have never actually met my biological father. He was never really present during my mother's pregnancy. He couldn't be bothered to be there when I was born and he used drugs and alcohol to escape after my parents lost my brother (he was a year old and died from a faulty pacemaker). 

When I was 12 was the first time I met my biological paternal grandfather, he is amazing.  My biological dad didn't come with him and decided to call and try and talk to me, it didn't last long. 

Three years passed and I talked to him again over the phone this time for about an hour and a half. I spent that time telling him all the stuff he put me through and how I was better off without him. He tries to have a relationship with me, but wont make an actual effort so it's not worth my time, I have a dad(my stepdad who actually raised me and loves me). Enough background. 

Last week my biological father called my mom to apologize for being an awful husband and father (its part of his AA), she told him she forgave him for leaving, but the father part he would need to talk to me. My mother called and asked if I would talk to him. I got frustrated and said I was not going to be a stepping stone on his way to recover and he doesn't deserve forgiveness. She understands and told my biological father that I wasn't giving him my contact info. He was very upset and told my biological grandfather who then called me upset about the situation.  So AITA?