Please stick to business. There was no reason for that fight. He does not want to be involved in your personal life. He is free to make that choice. He may have apologized, but you are not entitled to him making personal contact with you. Unless he promised bff that he would call you, he had no obligation to call you anymore than CW had an obligation to call you. He has cut off that kind of R with you.
The only thing these interactions get you is farther away from any stated goal you have. What steps can you take to stop them? Maybe you could email him and ask him not to take your calls, but to check his voicemail right away when you leave one just to make sure that you weren't calling about an emergency.
Forget the friends business. His sole interest there is feeling better about himself. It will not be a good friendship for either of you.
