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Hi @j03chapman
Welcome to the Community!
We were able to locate your account using your community details and it shows that the installation of the service is in progress.
However, we've checked the account under NBN Co. and it was tagged as active. We've checked the connection and it shows that the router has the old configuration, which is why the service is not working.
Please configure your router with your new TPG username and password. Refer to this article for the guide: How to set up TP-LINK C1200 modem for Windows 10
Once done, the internet should start working.
Let us know if you need further assistance.
BasilDV