I called back number (02) 8662 0401 reached voice mail but did not say for what company.

who is it?

A number I don't recogniset. I didn't pick up the call

Cold calling - should be banned

Twice in three days I've received a call from this number and no voice message was left.

A number I don't recognise no message left.
I didn't pick up the call

Have gotten two missed calls from this number, says it's from blacktown NSW

I didn't recognise the number so I didn't answer. call me twice this week

call from number when answered it hangs up , when called back no identification on voice msg simply says our operators are busy and will call you back

Unknown, didn't leave a message.

Static...Noone was on line

same no answer just voicemail

didn't answer either, but based on existing comments is starting to look like marketing or similar

I didn't recognise the number so I didn't answer.

I didn't recognise the number so I didn't answer. Probably junk.