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/troubleshooting_fttb
We were able to run some tests with your service and wasn't able to detect any issues with your connection. The modem is getting a good sync speed from the server with 99.99 Mbps Downstream and 40.95 Mbps Upstream.
We've created an article that will guide you on How to check the connection speed on your NBN FTTN/FTTB service
Here's a community article that will guide you on how to troubleshoot a Slow speed issue.