Just received a scam phone call

First time this has happened to me here in NZ. Just received a call to my cell, from an 027 number. A robotic voice then said

This is a One NZ urgent notice. Your account is about to go out of service. Press 1 for English, and 2 for Chinese

Of course I hung up, and checking my One NZ app which naturally had no issues. These kinds of things seem to be becoming more and more common. I wonder if more people are falling for them, or if the scammers are just more desperate?

Does anyone know how to report a phone number?