If you have entered the wrong shipping details at checkout there is a way to amend this. Once you have become aware of the incorrect details, simply go to one of these two links:
Here you should be able to re-direct the package to an alternative address or ask Australia Post to leave the package in a safe place if you believe you won't be home in time to receive the delivery.
***PLEASE NOTE*** This service only applies to orders within Australia. If you need to alter your delivery address for an international order, please contact your nation's postal service to find out how to do so. Charges do apply to re-directing orders through Australia Post.