Toxic relationship guidance

*Long post ahead; No negativity please*

Alright ladies, so I am in need of some guidance. I dated this boy for 2.5 years. I broke up with him recently because our relationship became toxic about a year ago because he cheated on me. Over the last year, he has cheated more, done things I am clearly not okay with, and abused me in multiple forms. He keeps texting me and calling me trying to get me back, saying we should go on a date ans this time is different. I wanted to marry this boy. I wanted a family and a future with him and all that hope has gone to waste. I have told him to leave me alone, but it seems that he does not want to cut the cord between our relationship. I have gotten a 50B against an ex before, and I'm not going through that process again. Also, we have broken up before and he's popped up at my home and my moms home trying to apologize and I have blocked his number, but he gets an app and calls me and messages me from numbers I dont recognize. How do I get it through this boys head that we arent going to work out and to move on with his life. I feel like the answer is simple but I cant seem to figure it out. For the record we are both 22, so dont think I'm some teenager trying to figure out what love is......