Caller: Scammers

Received this call at 11.06am on 23 May 2019 but did not answer it. I tried to call them back and..... "your call could not be connected, please check the number and try again"

Then later that day at 3.04 and 3.05pm 0434 480 860 tried to call me and again I did not answer. I called the number back and...."Optus advises that the number you have dialed has been disconnected"....

Quite often in the past I get calls from a landline and when they don't have any luck they try using a mobile number.