Didn't leave a message. My phone flagged it as spam. Rang the number and it says customer service but doesn't say a company name. Asks for your name and phone number to be left. I didn't leave anything.

Same as above, my phone flagged as spam. I called on work landline, got an auto message saying Customer Service and wanted my name and phone, so I said my name was Donald Trump and left a bogus number just for fun.

Caller: Scam caller pretending to be telstra

Scam caller pretending to be Telstra

I answered but they said nothing just hung up which is a scammer move

Hung up immediately after answering, has to be very suspect.

No message left. Phone flagged it as spam. Just had another missed call from a similar phone number (02) 9129 3037