Welcome to the Community!
I checked your account and from what I can tell, this case has been raised to our Engineering Team already for investigation. Once updates are available, a Phone Engineer will reach out to you via SMS or phone call.
Welcome to TPG Community!
We were able to locate your account using your community details and reviewed the notes.
We understand that you've requested to change your phone number, which was successful, however, it is not registered on the account.
We've raised this with our Tech team and managed to update the phone settings on the account.
The status of the phone number shows registered and should start working.
Let us know how it goes.