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-hfc-cable/problems_connect_internet_nbn_hfc
In your case, we have received reports about an unplanned NBN network outage in your area, but it was tagged as resolved by NBN Co.
At this point, we are further investigating why your service is still not working and we may need to send an NBN technician to fix the issue.