Caller: Scammer

A pre-recorded message stating my tax file number has been suspended and that they would arrest me if I didn't provide information. Hang up immediately if you receive a call from this number.

Refer to this website for more info: https://www.ato.gov.au/general/online-services/identity-security/scam-alerts/#June2020phonescam

An automated message stating I had a legal case against me (?), told me to press 1 for further details. I hanged up the phone and called them back, which leads you to another automated message stating that the phone line is unavailable/busy.