Call the police and have a restraining order against him

My ex had a friend, that divorced her abusive husband of a year, she cut all ties, but then she wanted to mess with him and try to get money out of him, so she played him and it almost cost her life. Serious, he came to her place, tried to rape her, stabbed her multiple times and she barely escaped with her life after loosing a lot of blood. Hate to be that graphic, but listen to others, if he calls you don't answer, if it is under another number, hang up as soon as you hear his voice and if he shows up to your door call the police, and get your friends and family to get the message to him to leave you alone.

How do I get rid of an annoying ex-boyfriend...
Umm.. introduce him to an annoying ex-girlfriend of yours..yup

Pepper spray in the face