Missed calls from (03) 7031 9712 and (03) 7031 9713. Neither directly left a message but (03) 7031 9713 did seem to forget to hang up which gave me about a 20 second voicemail listening to the background noise of a call centre. Couldn't tell where but they were speaking accented English which makes me think probably based overseas and very likely a scam. Blocked both numbers and will continue to block any others in this sequence as they arrive.

VOIP calls from: (03) 7031 9712, and (03) 7031 9713, and (03) 7031 9714. No messages left. I had previously blocked each of the numbers, but they are still showing up as calling me - this tells me it's VOIP not standard phone call. Blocked again and reported to my telco as spam. Hopefully they'll get the message and f-off.