Answered the call. It was an automated message saying "This is National Australia Bank. We have an important message for...(My full name)...Please press 1.
When I didn't press 1 it hung up on me.
I have called NAB and they haven't heard of any scam phone calls but said that it wouldn't have been am automated message if it was from them and they would send an email or SMS if they had an important message for me.

? MISSED CALL DO NOT ANSER MUMBERS I DO NOT KNOW

This is NAB and they will try to either get you to make a payment on your credit card, or whatever payment youre behind on.. They have tried calling mw 3 times today from, first a silent number then (08) 8545 1200, the (08) 8829 0198,to be honest i think NAB have no idea what call centers are out sourced to chase people for unpaid bills. The simple thing to do is dont answer unknown numbers. I never do then I google here and sure enough NAB and Ive been expecting them since last week as I must now be 6 weeks late paying..Its legit..I just refuse to answer because I dont have even $10 to pay them this week..I will pay I always do..Its my debt I owe it, but you cant get blood out of a stone...

I called back number (08) 8829 0198 rang once then gets disconnected automatically.

Caller: National Australia Bank

This is a legit call from National Australia Bank, telling you, your credit card payment is overdue

Caller: Balaklava SA

Even though I live in SA, I don't know anyone from Balaklava, so nfi...

I called back number (08) 8829 0198 rang once then goes to busy tone.

Call says it comes from Balaklava SA. I called back but just got the busy tone.