I never answer unknown numbers, no message was left. I called back via a PABX that hides the outgoing call number and confirmed it is not a connected number. Therefore it is a spoofer and a scammer.

When I called back the Telstra recording tells me that this number is not available from this service!
Obviously some overseas VoiP caller trying to sell me God knows what.

Claimed to be “PayPal” accent was a dead give away that it was a scammer in an Indian call centre. Because you know PayPal would call you out of the blue from a personal mobile number not a business number.

Scam call from "visa and mastercard at your bank" trying to find out details of my transaction history and pretending they had a suspicious transaction.

Rang to tell me someone had signed in to my amazon account and had added an iphone to my cart
Wanted to know if it was me - said no and they hung up

Bullsh*t artist. Blocked straight away.

Spam again

Caller: Telemarketer

Trying to talk to me about energy bills going up, I muted myself and they hung up

Could be a scam?

calls are monitored they did not speak , phone said possible scam.