Welcome to the Community @Thomasnoel
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-hfc-cable/problems_connect_internet_nbn_hfc
In your case, there's a possible fault within the NBN network which needs to be investigated by our Engineering team in order to decide if a TPG or an NBN technician is required to fix the issue.
An assigned Engineer will be in touch with you via SMS or phone call once an update becomes available.