How do i get rid of a ex who wont leave me alone and talks about me to other people?

well i had a messy break up with and ex who kept guilting me into on again off agin things nad makingm e say i love him. he found another girlfreind instantly and then he sends me anote saying how he still likes me and to take him back and give him another chance. I called up his new girlfreind and told her what happened.then he came by my house and i tol him off and i told him that i had called hi girlfreind.Then she breaks up with him. He keeps sending me notes that baisicly try to guilt me back into going out with him.After i kept telling him no.The next day he texts me and says to meet him somewhere cause he is bored.I let it out and he keeps saying about his dad haiving a heart attack screwing him up to which i told him it doesnt have an impact on you cheating. by the way his dad is fine) andnow he talks to people about me and i heard from a few different people the somae thing.He says he is going to egg my house. what do itell him to stop talking about me and to not egg my house?