I had a similar issue on a flight from LAX to AKL last year. I told the Flight Services Manager on board about my concerns regarding the way the issue had been handled pre-takeoff, and didn’t intend to do any more or claim compensation. He must have lodged a claim as I’ve had several emails since saying Air NZ is processing a claim for compensation. It’s nearly a year since the flight so I have low expectations of ever actually getting anything. I’ll update in this thread if some AirPoints Dollars or cash ever turn up.