Saying that they are calling from Telstra and I don’t even have a n account with them one of the biggest red flags straight away and it sounded as if it came from a call centre. These scammers are wasting my time what is the purpose of having your number on the do not call register as well as having it unlisted it is an evasion of one privacy.

Did not answer and they did not leave a message. After reading above did not call back either

Caller: Mater Home Lotteries

Had a missed call from this number; no voicemail left. I called back from a private line; it's Mater Home Lotteries. Likely offering a chance to buy additional tickets in an upcoming lottery. Though, judging by the other comment here saying it's Telstra, might be that this is one of those floater phone numbers that gets circulated between different companies every however-many-months. Annoying.