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 lodged the case with Telstra as there's a fault within the copper network. They've booked a Telstra technician visit that will check your service.
Further updates will be given by your assigned Engineer as soon as it becomes available.