I'm so sorry you are going through this. I would think about calling the phone company or something. I would maybe tell the guy to please stop calling and you will have your AH call him back. I went through a similar situation. My ex abf was on the third floor and his friend kept calling his phone and I made the mistake of answering it and I simple told him he would have to call him back and to stop calling because I couldn't help him. Well he did call twice after that and then stopped.