I've been getting calls over the last few weeks where nobody says anything. The numbers involved so far are: (03) 7003 5352, (08) 6280 2689, 0480 028 662, (03) 7003 6839 and today (02) 7202 5176. They all appear to be ARMA, a debt collection company. We don't owe money that we're aware of. Hard to pinpoint details of anything we may owe when they don't say anything.
Actually just called today's number back and they can't tell me anything because it's not my name on their listing. Does silence get many results? Is that a proven method of recovering debts? Fair Trading or someone like that is my next call.

i called back number (02) 7202 5176 reached IVR for ARMA.

Caller: Arma

I think Arma does collections for tolls and centerlink.

I get the same and they leave silent voice messages too - obviously if something is owing it can't be that important if they're not saying anything? lol

I called back number (02) 7202 5176 reached IVR for ARMA.