From your other post it seems there was a serious mishap in scheduling and something went very wrong. You would deserve a BIG apology. It is very unprofessional to double-book for a psych visit! But maybe there is more to the story than we know?

I would want to call and find out what happened and why. And also see if there is an explanation you are missing. Because if you forget what happened, maybe there is a detail that you're not aware of? This T sounded good on the phone, right?