I would email and ask if you are going to be reimbursed or given more time on another day.

though i tend to not stick up for myself.... my last t messed up or missed several appointments. She was deeply sorry after all of them, offered me my money back, made up time on other days. But then the one day I missed mine because it was suddenly at 9am in stead of 2, she lectured me on how she'd have to charge me full if that ever happened again... that we were able to fit me in later, but that cannot happen again. in a full year, i missed one. it felt really unfair to be lectured so. i had been so upset when i found out i missed it and cried and wanted to get in... and then after that i hated her and didn't want to be there.