Welcome to the Community @Sarahandnique9
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
Also, to make sure that the configuration of the router is correct, we've created an article that will guide you on how to check the configuration of the router. You may check: How to set up TP-LINK C1200 modem for Windows 10
Feel free to search Community for help with your issue, or contact us and we'd be glad to assist you.
BasilDV
