Hangs up when you answer. When you call back it says "all of our operators are busy, we will endeavour to call you back".

Suspect it's one of those calls to find out if it's an active phone number before a marketing/scam/sales call.

I called back number (02) 4067 5070 reached voice mail but did not say for what company.

Caller: They said it was Chase Edwards' company.

I have now blocked the number. Obviously a telemarketer.