I rang once and got disconnected

I got a missed call from this number and it went to message bank. I called it back and a male with an Australian voice answered and said he had not called me and did not know me.

Called, didn't leave a message when I didn't answer. To me that equals telemarketer or scammer, number is now blocked. If anyone running a legitimate business reads this - always leave a message, because if you don't people are going to assume the worst and block you.