I called this number back within a couple of minutes of being a missed call.
Your call couldn't be connected. Please check the number and try again. My experience with these messages is that they are a marketer, they don't want you to contact them, they want to catch you unaware so they can present their spin.

In Australia use of “overwriting” is legal. The real phone number is overwritten with a fake unconnected number. I can’t believe the poor consumer is subjected to this garbage, but again, it’s legal. Often when you call the number back, you receive the not connected message, but instantly receive a call back from another number. My solution is to set up spam-busting call flooding, and tie up the numbers until the system fails.

Caller: Dunno

As soon as I answered they hung up

Called no message

Caller: An Energy Hot Water Company

Called about a So called Government Energy Assistance program to replace your hot water system to solar i assume as they said they couldnt do gas , I told them to see the landlord : in short a Nuisance Call

Fake number - telemarketer for sure.

I didn’t answer and they didn’t leave a message

January 5, 2023 - Missed call, location Sydney New South Wales

I didn't answer as didn't recognize - no message left so i will be blocking this number.

No message left. Likely a telemarketer or scammer.

Didn’t answer

Caller: (02) 7257 8839

No message left, assumed to be telemarketer or scam

Calling from overseas around free hot water systems

Another painful scam call

Caller: Unknown. Didn't know number so didn't answer

Didn’t recognise number and won’t answer. Too many of these calls received and I will never answer them

My phone blocked this number as a scam call, and reading other reviews it appears it is.

Thank you very much for the information.

another of those calls my phone tells me is a suspected spam...didn't answer it ....blocked now

Caller: Don’t know

Called left no message.

Someone called me from (02) 7257 8839. Didn't leave a voicemail. When I called back is an automated of a woman just saying goodbye. Scsm. Beware.