mcl, I think it's perfectly fine to terminate through a voice mail or letter. You really already told this "therapist" that you weren't clicking with him and he went ballistic on you. That's about him NOT you. I agree with critterlady, why pay for the session that might mean more of the same!

I told a therapist through a letter that I had decided we weren't the right "fit". I angsted about it a bit because I had been referred to him by my previous therapist who was in partnership with him before she retired. I felt as though I had let her down . .. but deep in my gut I knew he wasn't the right therapist for me. That belief was cemented for me when I found the therapist I'm working with now . .. we have our moments of difficulty, but she has stuck by me and weathered the ups and downs in our relationship without EVER putting the blame on me. She sees the difficulties as something we both have a part in. . . that's the sign of a true and genuine partnership in therapy. I know the right person is out there for you!