I answered both calls and immediately they hung up.

telemarket for changing energy providor.

Answered a call earlier today from this number that immediately auto-disconnected.
Just received a second call from this number. Didn't answer and no voicemail was left. Have blocked the number!

Caller: Another nuisance caller

Rang back just ring and then has auto goodbye

Scam - block them whoever they are

I called back number (03) 9989 1708 spoke to a guy who said I've reached Offer Assurance.

no answer and then a machine said "goodbye" so sick of scum callers every day. I would shove a phone fair up their a$$hole$ without lube if I get close enough.

Hung up when I pick up the call