Called the number from a landline and got the message Optus advises that the number you have dialled is disconnected.

Noisy call centre. Wanted to talk about my electricity plan. Quickly let them know not to call again and not interested.

Caller: Centrelink scammers

Spam !!!
Robocall message said from Centrelink and gave a claim application number then ask me to call (02) 8317 1419 (Centrelink scammers)
ignore these two numbers.

missed call and when l rang back 20 min later, the number had been disconnected

They are spam numbers do not answer

spam,

rang back and advised the number was disconnected. ???

A lot of noise in background and didn’t say anything, when I rang back seconds later the number was disconnected