Ugh, this would have totally triggered me too. Once, years ago, a T I was seeing told me she was expecting a phone call because she had had to call the police to check on another client. I asked her if she wanted me to leave and I would reschedule. She said no, so I stayed for the session. Her phone rang once or twice, but it was someone else, so she just let the phone ring. Then she tried to muffle the sound by putting it behind her back! This was before cell phones were so prevalent.

Eventually the police called and she went into the waiting area to take the call. I wish she had just let me reschedule. Like you, I felt like the time I was paying for was totally wasted. She was distracted, which I don't blame her for, but I don't think it was a good judgment call to have me stay.

I'm sorry you had such an awful experience.