Disturbing considering mis-assignments of numbers and possibly also accounts has a long history.
Similar happened to one of our family, with one difference they were an active Optus customer at the time. A second twist was the number and service was supposedly transferred concurrent with an in store transaction. The issuing of a replacement sim to a customer more than 2000km distant.
What followed was stressful and incomprehensible. The event is now more than 10 years old.
P.S. to note:
‘Mobile Phone Number Porting Fraud/Identity Theft - #22 by Fred123
