Caller: 0480 097 485

Calling my number, not answered and leaving messages. Must be a scam.

I foolishly picked up, thinking it maybe dodgy, and sure enough, they hung up after a pause, no message. Seems to be checking to see if I have a live number

Unknown - didn't leave a message.
Google says 0480 097 485 is a Mobile Phone Number and could be provided by Pivotel Satellite Pty Limited.
Not familiar to me so will block.

Male called, told him I was busy but he persisted so I hung up on him.

He phoned again 5 minutes later but this time he hung up on me when I told him I was busy!

Scammers

Claimed to be conducting a survey in our local area. Number possibly tied to a VOIP service.