We can see multiple posts and help from other Forum moderators.
Your fault has been raised and is progressing. Someone will contact you ASAP.
Unfortunately if it is an NBN fault, all we can do is raise the issue with NBN and they will send their techs out to fix the problem. We can not say when it will be repaired but i suspect it will not take too long.
The goal here is to get your service restored before addressing any other concerns.
NBN have put this onto HELD STATUS. They say there is some network issues that needs addressing and planned remediation date is for 29/05/2020.
Unfortunately there is nothing TPG can do. The issue is in the NBN network and only the restore/repair/address it.
We are going to have to wait until Sat 30th to see if NBN get the issue resolved and your equipment installed.