I called back number (03) 8765 4609 reached voice mail of a guy which I wasn't able to understand when he said the company name. He mentioned financial services though.

calling about the financial services i have with them

I received a call from same number (my phone displayed -"Dandenong, Victoria"). Called back and yes some financial services company. I have blocked this number now.

I had a missed call from this number and no message was left. I do not know this number.