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Thanks for your query!
Let me have a look for you, and I will get back to you ASAP.
There is also a new ''TPG Mobile APP'' to help you with various trouble shooting and account issues, via a mobile phone app.https://www.tpg.com.au/download
I can see your NBN-FTTN service has been back up for 24hrs now.
Perhaps it was just a one-off random NBN issue that has been resolved.
Any further issues, please let us know.