Get online support
Hi Yosepoh87,
You have an ADSL service, could you check if there is a dialtone present, it must be clear.
If so, the troubleshooting will be checking with spare router, if any filter please removed while testing.
https://www.tpg.com.au/support/problems_connect_internet.php
If not dialtone, please contact technnical support as earliest you can.