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 your case, our Engineers have detected a fault within the copper network and have raised it with Telstra. They've advised that your service has been affected a copper network outage and due to complexity of the work required to resolve the outage in your area, they now aim to restore the service by 03/Apr/20. This outage is affecting multiple ADSL services as of current and rest assured this issue is being given utmost priority.
Your assigned Engineer is monitoring the case and will provide you with updates as soon as it becomes available.