For customers experiencing any issues with their NBN service, we recommend the best thing to do first is check if there's an outage.
Check our Service Status page for any known outages.
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, you can proceed with the troubleshooting steps indicated on this link : Troubleshooting No Internet Connection
In your case,we can see that an NBN technician went out and fixed the issue.
Let us know if we can be of further assistance.