Yesterday, I rescheduled an appointment that I was due to attend this afternoon at 3.30. All good, appointed changed to the same day in two weeks.
Today at 4pm I had a call from a number I didn't recognize, which I let ring out. I have stopped answering my phone because of all the spam I get these days. If it's important, they will either leave me a message, send me text or send me an email. I have no reason to speak with someone on a phone unless it's life threatening.
Anyway, the person ringing left me a message to say I missed my 3.30 appointment.

Grrrrr, why is it so hard sometimes.