I called back number (03) 8658 9054 rang once then goes to busy tone.

I called back number (03) 8658 9054 was put on hold music directly but no one answered the call.

I received 2 calls this week from the no. saying he was from the Australian Taxation Office threatening to put me 'behind bars' if I didn't return the call. Another from the American accented guy (02) 6100 1878) from the ATO saying I had to return the call because the matter was time sensitive.

Same threat as above on 17/06/15.
I was expecting a call from Dodo that day and same accent so possibly them.
Altona.

Got the call on 17/06/15 and person with heavy American/Malaysian accent, (like staff from Dodo) left threatening message ans said his name was Carl Cooper and I must return call. I am going to report it to Telstra and everyone else should do the same

received call from the number and same threat as Carol

Got a call from a guy who said he was a police officer and made a threat that there would be dire consequences if we did not return the call