Much of the discussion around chargebacks here only applies to the US and not NZ.

I know for a fact that even last as late as of a week ago in NZ there was zero chance of having a chargeback processed for a flight because the banks and credit card companies would simply not accept these. I can't provide any update as to whether anything has changed here recently. Anybody who attempted a chargeback would have also been stung with the processing fee for this being declined.