I'm actually surprised by this as I've always been able to meet her at the time/date requested with good comms and I keep returning.
To be fair, I couldn't match her availability due to my work, as I said, its helpful she updates her availability regularly.
Reasons for the negative, is that she didn't offer any alternative times and when I got back to work, she had amended availability from 9am-10pm to 1pm-5pm - so she was still working that day, possibly cancelling my booking because she'd overdone it the night before, whatever the case, she wasted my time.
She should have cancelled my booking at the very least, 2 hours before start time, she left it so late that I had already arrived when I received her message.