Caller: (03) 6123 3916

I had this number call me and leave a voicemail that said “… is incomplete. The service will stop in 2 hours. For English services, press 1. For Chinese services, press 2” and then stopped. First part of the message was cut off but my guess is some sort of scam after reading your post.

mid-afternoon Friday, unknown number so didn't pick up, looks like just a scam

Caller: Immigration Bureau

I did not pick up the call as the number is unknown to me, a recorded message was being left in my voicemail. The message claimed that they are from the Immigration Bureau, said they have documents to be delivered to me but failed to deliver for a couple of times. It must a scam call as there is no such thing as "Immigration Bureau".