This is a scam number that appeared on my phone. They advised that there was illegal activity on my bank account and tax account, so my tax number has been cancelled. The terminology used was not Australian Govt. terminology. For giggles, I pressed 1 to get to an operator.
Her:"How can I help you"
Me: I don't know, you called me............
she hung up.
Phone number is disconnected when I tried calling back.