I called back number (02) 8583 6470 rang once then gets disconnected automatically.

They use this phone number too 85836471

yeah hung up - engaged after ringing back -- added to auto - reject list

Keep calling. I have blocked them. No idea who it is! So much for the do not call register!

called never said a word then hung up. block this number

Caller: Unknown caller

They will ask you to confirm your name eg. "Is this (your name)?" Say no even if it's correct. It's a scam to get you to say Yes.

I rang the number and it was engaged.

sales call