Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Hello,
This is a difficult situation, so let me explain it clearly.
Microsoft 365 subscriptions are tied to the country or region where they were purchased. A subscription purchased in the UK cannot be renewed using a payment method with a billing address in another country.
You would normally need to let the current subscription expire, change your Microsoft account region to New Zealand, and then purchase a new subscription using your New Zealand payment method.
Unfortunately, I do not believe there is another option unless you can continue using a UK payment method with a UK billing address.
The main issue is that allowing the current subscription to expire would also cause you to lose the Classic plan. The Classic plan requires you to remain continuously subscribed. Purchasing a new subscription in New Zealand would place you on one of the plans currently offered there, not the Classic plan.