I called back number (07) 3074 5400 rang once then gets disconnected automatically.

Caller: ANZ bank

Calling about existing Home loan

I received the call but no one there, and then I block this phone number

Caller: ANZ

They left me a voice message the first time. It is ANZ Bank. They call again and didn't leave any message

I accept the call，she said she is calling from some group，when I ask who is there，no vioce again.

Caller: I don’t know

This number called me, and my fience awnsered it as they kept calling and calling and it was some bloke didn’t get his name or where his from but it took him a while to actually talk we both think it’s a scam

Called twice but left no message

They keep ringing me but don't leave a message. As a rule of thumb I now never answer a call unless I recognise the number. I figure if it's important they will leave a message for me to call them back