Good ol'consumer NZ. Openly available (non-paywall) article on bypassing Geoblocks as to do so is "legal in NZ*.
Just in case anyone on here is still unsure how to do this, it's a pretty basic primer to get you started: https://www.consumer.org.nz/articles/how-to-get-around-geoblocks?utm_content=how-to-get-around-geoblocks
Enjoy (unless you're Spark/Sky/Mediaworks/TVNZ - in which case, suck it).
* but may, they do point out, be against T&C's, which as we all know is *not* equivalent to being either a) illegal or b) pirating copyright.