I tried calling WINZ again later in the day, and then I tried again just now. Same answer as the first time;
We're experiencing very high call volumes right now, and we can't answer your call.
So ... automate a callback, and hire some more fecking call centre staff FFS!
Also maybe get rid of all the pointless hoop-jumping that wastes staff time. Like making people reapply every 6 months for a benefit we obviously need, or your data-matching with IRD would have flagged fulltime income.