Welcome to the Community!
Before attempting the troubleshooting steps, TPG recommends that you:
1. Check our Service Status at https://www.tpg.com.au/support/problems_connect_internet.php
2. "Power cycle" your ADSL modem. This means turning your modem off and waiting for one minute before turning it back on again. This allows your modem to reestablish connection to our server.
3. You may check out this Community article:
Troubleshooting a Slow Internet Connection
4. 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, the issue is now raised to our Engineering team. Should you need further assistance, feel free to search community for help or chat with us at https://www.tpg.com.au/support/contact/