Did they tell you the outcome yet? If not, don't give up hope, sometimes it turns out not to have been as bad as you thought.
I do hate telephone interviews though, had to have one for one of my PhD applications as the supervisor was out of the country at the time, and found it very difficult and awkward. It's much easier to relate to someone face-to-face, I think, on the telephone with someone you don't know it's very difficult to build a rapport and for the conversation to flow properly. Or maybe that's just me, I've always disliked using the phone generally.