Welcome to the Community @patty_77_3
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 : Troubleshooting No Dial Tone - TPG Home Phone/Voice Service
In your case, since all of the possible troubleshooting was exhausted this case will be escalated to our Engineering team for further investigation. An assigned Engineer will be in touch with you via SMS or phone call as soon as an update becomes available.
If you need further assistance, please let us know.