First off, that sucks! (Can I say that?). I would be really hurt and do not apologize for calling and leaving that message. He needed to call. He needs to follow through and call you back with an appointment time. And you should let him know how disappointed you are that he didn't call.

My t is just terrible on the phone too. I told her recently that when she calls me (to reschedule or some other small matter) I feel as though I am talking to a complete stranger with ZERO warmth or familiarity with who she is talking to. It was a good conversation and one I still have strong feelings around, so I need to go back there.

Good Luck and let us know if he calls back. Hang in there. Most of all, don't take it personally. It's not about you. He made the mistake.