Flight Cancelled - No Reason

Was meant to fly at 9:45am from Sydney to Sunshine Coast.

Had web-checked in but was told at the counter the flight had been cancelled. I was then informed I had been booked on a QANTAS flight to Brisbane at 12:15pm. A bus would then take us to the Sunshine Coast.

Frustrating as no reason given for the cancellation. I would have liked a SMS informing me that the flight had been cancelled.