Yeah.... nah.
That's just not right. I doubt very much it is a "therapeutic technique" or a case of deliberately "using it against you." That would just be sadistic and wrong on so many levels. It doesn't sound like she has it in her to be deliberately sadistic??
But repeated episodes of not turning up as a therapist is nothing less than gross incompetence. That is a fire-able offence in any profession and especially when it potentially has a very negative effect on the emotional well-being and mental health of another human being.
Just no. No. That is absolutely not okay or acceptable at all. I would say "You deserve much better than that" but just in case you in particular feel you are unworthy of decent treatment by other I will say ALL therapy clients- every single person who enters into therapy with a professional - deserve much better than that.
It does sound like this woman is not fit to practice.