Calling from Telstra internet security telling me my service has been compromised… what a joke … never have nor will I use Telstra …

Got missed call from this number, don't know who called and unable to call back.

Received a call from this number and the person asked: "Is this XXX(My legal full name)?'' Once i said yes, he hung up.
Called a minute after and the number was disconnected..

Someone from this number Asking ‘Is this XXX (Mentioning my real name)?’

Once I said yes, they immediately hung up. Called back a minute later, and number was disconnected