I called back the number (07) 3171 5301 and reached vm that did not mention the company name

I don't answer numbers I don't know & have had 2 calls from this number & both hung up when my voice mail kicked in. Can't be important if you don't leave a message.

Called I didn't answer

I've received calls from this number two days in a row.
I don't answer the call, but neither do they leave a message.

Caller: ‭(07) 3171 5301‬

Frequently get calls from this number that is apparently based in Brisbane Aus and I often hear a second or two of noise/breathing when i pick up and they hang up after a few seconds of silence or when I say “hello?”

They called me twice.“Energy Australia(?)”, as they said and stopped conversation....

This number keeps phoning me and hangs up immediately I answer. Will add to reject list!

Yes as above I called back (07) 3171 5301 and it was a Voicemail in an American accent asking me to leave my name and number no mention of the company name.