I've been getting a lot of spam calls from 02 4307... this appears to be yet another. Another website said the caller claimed they were from Telstra, but the person dialled wasn't a customer.

A woman saying she was from Telstra called from this number.. She said that Telstra had discovered an issue with my home internet security.. I said I would call Telstra back later and she was concerned about me not being able to speak with her later. Then she asked for my phone number.
She rang me - so she would have my number.

Caller: someone pretending to be Telstra

am not a Telstra customer but was told it was about my Telstra internet connection