Caller: Greenworld services

Offering covers for covers for evaporative cooling vents. Received on a number that is unlisted and has not been attached to any services whatsoever yet had my name.
When called Telstra recording that the number was disconnected.

Male voice said hello twice on voicemail and then disconnected. When rang back, it reached an automated Optus message saying the number has been disconnected.

Kept calling over several days but never left a message