I'm not sure I understand. Are you saying that your pdoc cancelled your appt because of an emergency meeting at his office, or are you saying he cancelled YOUR emergency meeting?

I think you should call the front desk and explain the situation. I obviously don't live in Australia, but in the U.S. at least, doctors have a responsibility to their patients. I don't know why he couldn't just reschedule you to an appt slot at the end of the day, after all of his other appts. For example, if he works from 9am until 5pm everyday and he cancelled your 10 min appt, I don't see why he can't just work from 9am until 5:10pm (for example). It's all online, so it's not that difficult. But that's just my opinion.

Sorry this happened though. That sounds super frustrating. My previous pdoc once had an emergency, so he scheduled for first thing the next morning, before all of his other appts.