Welcome to the Community @jamesclish
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/troubleshooting_nbn_hfc
We were able to locate your account using your community details and learned that your service were affected by an NBN network maintenance to improve their connection, which will benefit most NBN customers. Your connection has been stable after the maintenance and appears to be working within specification.
If you need further assistance, please let us know.