You know, chit happens all the time. Nature of the business. That's why I don't do the prepaid hotel thing, and never did prepaid session thing (remember those?).
From time to time I wind up booking sessions that never happen. Don't let it phase me... just try and make sure it doesn't happen when schedules aren't strained on either end of the line -- mine and the providers. That way the disappointment isn't catastrophic.
What's described in this thread is MAJOR BS!