Caller: Person supposedly from Commonwealth Bank Security

Had a call from person supposedly from Commonwealth Bank Security, they stated that there had been a suspicious $800 bank transfer request go through their server from America and was I aware of it, i stated it was highly unlikely that it was from my account as I do not bank with Commonwealth Bank, the received phone number was from 0450 626 036. I checked this numbervvia 'Reverse Australia' -number was unknown and not listed, phone prefix of 0450 is listed as a Vodaphone prefix. SCAM..........