You should call up to make sure they can fit you in. It sounds like, as I stated before, the keypad module battery has failed. Alternately, take it to Wangara, I know there not busy. Be sure to take it to either dealership early in the morning. If they need to replace the module they need to contact Subaru Aus in the eastern states for master codes etc. With daylight savings it needs to be before 2o'clock our time or they're closed.

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F.B. Racing
01 WRX (STI badged)
2010 XR5 Focus
06 Impreza Hatch 2.0i