Need advice on how not to be so mad at my father.?

Im 24 years old I have an older brother who is 28 years old. My mom and dad divorced when I was a year old and my brother was 5. My dad cheated on my mom and moved out of state and didn't seem to want anything to do with us. Because he didnt want to deal with my mom. So my grandparents would make him. He lives with his girlfriend in florida. He recently called to make amens with me. I fell rejected and hurt. I needed anwsers and alot of the things I asked him were very inportant to me and he just blew it off said the past is the past get over it. But I cant just get over it cause his actions and his answers affected how I grew up. I love my mom very much and she has always been honest with my brother and I and my dad basically lied about everything I asked him and said I need to get over it and move on. But I cant because I am so hurt. What should I do? I have told him he is just a sperm donor to my brother and I and we dont want anything to do with him. But am I wrong to be stuck on what happened in the past and just forget all the lies? Help!