It looks like you are not in Australia. Only Australian residents 18 + can enter this promotion.
If you are an eligible Australian resident 18 years + and are having difficulty entering this promotion in Australia, it is because your IP address is detected as coming from another country.
This could be because you are connected via a VPN or corporate network.
Try entering from your mobile phone (using your local carrier) or disconnect if using a VPN.
If you continue to have issues with the country selection, please get in touch via the Contact Us page.