Accidentally left a VM which turned out to be a minute of indistinct noise and chatter in the background similar to a call centre. Rarely get phone calls and in the past week or so, I suddenly received four or five of these types of random unknown calls around the same time in the arvo all coming up as sort of similar but different Aus mobile numbers. Never answer. Usually, never VM left. Not sure if due to recent Qantas data leak.