Another scammer - rang number back - disconnected

Caller: SCAMMERS CLAIMING TO BE SECURITY FROM THE NBN.. 0433 227 895

Another scammer claiming to be from the NBN... beware, they tell you to check your bank account because they found someone was hacking your account... becare they will clean all your entire bank account ... they will have all your account numbers passwords etc... please report them to the federal police..

The call followed a call 30minutes prior from another scam number (03) 9102 7509

Answered a call, someone spoke to me in chinese, said my name and then hung up on me. Called back and got directed to Oz Green Homes..

Number called me, I picked up, they immediately hung up without saying anything. Scam

This number called me, went to message bank but left no message. if they dont leave a message how do you know its a telemarketer

I called back the number (03) 9112 5827 and reached vm but couldn't hear the company name

I called this number back and got Optus disconnected voice msg
Scam?