DO NOT RESPOND:
Even though you are doing all you can to shut him out, he will still get through sometimes. He will somehow leave you a voicemail or send you an email or text that involves a little bit of sobbing, some apologizing and the eventual psychotic progression into accusations, calling you a wh*re, screaming at you…you know, the usual train of thought for a crazy person. But, do not respond. It will be SO tempting because he is insulting your pride, but you have to remind yourself “this person is not sane.” He is just saying anything to get a rise out of you. And a stable, mature, sane person would never have left a message like this.