Australia Reverse Phone Lookup

Answered a call from this number on my partners phone . It was a recorded voice message that said they had made numerous previous attempts to make contact ( no previous calls from this phone number in call history ) . Stated there was a tax avoidance concern and to make contact with the above number . Then went on to say that if no contact was made there was a threat of an arrest warrant and possible imprisonment . Tried calling this number but only got recorded answer that number is busy and unavailable .
Very unsettling .

when called answered a voice message stating it was the Australian tax o0ffice and that I was in breach if tax evasion and that a warrant for my arrest was being made and to call the number- I called the number and it went straight mgs bank
Anne