Welcome to TPG Community!
We were able to locate your account using your community details and tested the line, but wasn't able to detect any fault within the NBN network.
We've noticed that the speed test result was done via a WiFi connection, were you able to test the speed via Wired as well?
We've created an article that will guide you on how troubleshoot a slow speed issue. Refer to this link.
WiFi interference may also cause the issue. You may check our article on how to improve your home network. Check this link.
If the issue persists, please let us know and will check it further with our Tech team.