pain in the ear 22 calls today gotta be election stuff wont answer

Had FIVE calls today from (they say) the NBN. It's a scam.

Fourth scam call of the day so far! usual thing - long delay, indian accent, claim to be from security department of nab - asked if i made a payment to mr xxxx in new zealand?
When i said i ddn't have a nab account, they hung up.

This number phoned 20 minutes previously but went to voice mail, where they didn't leave a message. Also received a similar call earlier in the day from a similar phone number - (07) 3171 3519 - also claimed to be from nab security department.