Number given for tax fraud scam. Beware.

An automated message from "The Australian Tax Office" telling me I have not paid my taxes.
Why can't the Australian Government prosecute these fraudsters. They don't block their number, so should be traceable.
I feel very frustrated and intimidated by these people. This is not the first time, I have had approximately seven calls, some from different numbers, all with the same message.
Don't say call block them, because my phone memory is full of blocked numbers from these parasites. They must be sucking some people in, as they seem to be getting more regular.

this phone number and another (02) 6188 5661 also tax fraud scam, BEWARE it is all fraud!!

I've had 2 messages left on my answering machine from this number saying I was in trouble for not completing my tax correctly....also received email message! ignored both. definitely a SCAM

dont answer

Tax Fraud scam - leaves this number to call back. They left 5 messages on my machine today.

Just reported them to ATO as they were silly enough to leave a voicemail.