Calls & hangs up
Never leaves a message or anything

Caller: Someone claiming to work for Canter?

A women rang and left an audio message.She claimed she worked for a company that goes by the name Canter,doing a television home viewing survey or something like that.

Calls & hangs up

Persistently asked if I could hear them ok. Seems like scam phishing.

I called back and got some automated voice thing by "Cantar or Kantar market(I couldn't get the rest)

Called and hung up, didn’t leave a message.
I was bored so I decided to call back. Automated message on the other end saying it was ‘Kantar Market Research’.

Same as the comment above, and she or he hangs up if you call back.

Calls at 8:30 on the dot.

Call from smart phone has words "potential fraud". Missed call msg shows number (02) 9184 9753

Caller: I don’t know

(02) 9184 9753