similar numbers from over east call me multiple times a day and then a robot says 'goodbye/ try calling back and its disconnected or busy, its getting on my last nerve and we should be allowed to find out who i making these calls and press charges against them! its just frustrating and its some sort of scam.

Exact same robot / scam. Answered and didn't speak and instantly said good bye and call ended. Have blocked the number now. Had a gut full of optus not blocking these muppets.