These bastards have been bugging me for ages. Clueless scammers.

Hung up, did not leave a message. When I called back, the number did not exist. Later, from another number, came the persistent NBN call.

Automated call to say that they are calling from the national NBN broadband commission to tell me that they are going to disconnect me as NBN is now available in my area. I am already on NBN.