What your T did is unprofessional. She's responsible for managing her schedule in a way which is respectful and considerate of the people who keep her in business and who depend upon her in a very personal way. I encourage you to print what you've written here and share it with her. I would expect a full, sincere apology. I absolutely hate paying for sessions where we must discuss my T's missteps like this, but hopefully it helps you work through these issues as they certainly arise outside the therapeutic relationship also.

So sorry your T was inconsiderate! Hope you're taking extra good care of yourself, doing something fun or healing instead.