Welcome to the community!
Before attempting the troubleshooting steps, we recommend that you do the following below.
If you are still unable to connect to the Internet, you can proceed with the troubleshooting steps indicated on this link: https://www.tpg.com.au/support/problems_connect_internet.php
In this case, we've seen that your service has been connected to our network, on the other hand we noticed that the NBN installation for the service is ongoing, we'll have one of our Provisioning Case Manager to contact you for the update.
Should you need further assistance, feel free to search community for help or chat with us at https://www.tpg.com.au/support/contact/ and we'd be glad to assist you.