For customers experiencing any issues with their NBN service, we recommend the best thing to do first is check if there's an outage on the NBN network.
We have created this article that can guide you on How to Check for NBN Network Outage
If there are no known outages in your area, customers can proceed with the troubleshooting steps indicated on this link : https://www.tpg.com.au/support/nbn-fttn/problems_speed_nbn_fttn
We've also created an article that will guide you on how to troubleshoot a Slow speed issue.
We were able to check your account and understand that you are under the NBN12/1 speed tier. If you require more speed, then you may upgrade to our NBN 50 or NBN 100 speed tier.
Here's another community article that will guide you on How to check the connection speed on your NBN FTTN/FTTB service
Feel free to search Community for help with your issue, or contact us and we'd be glad to assist you.