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/problems_connect_internet_nbn
In your case, there's no address issue as it was confirmed by NBN Co that your address is in the correct location ID.
Please make sure that the router that we've provided is connected to the correct UNI-D port (1) of the NBN NTD box.
Feel free to search Community for help with your issue, or contact us and we'd be glad to assist you.