Same thing has happened to me. Moved home and NBN was installed on Wednesday 18/11. Home phone was working fine on Thursday, but from yesterday until now, I have been unable to make outgoing calls. I get the same message that you got.
Welcome to the Community!
We were able to locate your account using your community details and learned that the status of your phone service is 'Unfinancial'.
This means that you don't have enough credit to make any calls. You may add credit online by accessing your account here.
You may also consider an Add-on for phone calls. Check the plan here.
Let us know if you need further assistance.
I have been direct-debited monthly for either $69.99, $79.99, $89.99 or $79.99 by TPG for the past 7 years, since 29/7/13. In all that time I have had Massive Talk, Extra Talk or Oz Talk as add-ons. All of these include unlimited local calls, national calls and calls to Autralian mobiles. I have NEVER been "unfinancial" as you imply. When I click on "My Account""Current Balance" it says no outstanding amount to be paid. so I am not unfinancial.
My initial Home Phone prepayment was for $20. Would you please itemise what calls I have made outside my included calls that have used up this $20, resulting in my, according to TPG, having a $0 balance.
While checking my account once again, please verify also what the invoice for $30 on 19/2/2020 and the invoice for $69.99 on 4/3/2020 were for? These deductions were outside my usual monthly direct debits.