NZ Customer being charged AUD for product shipping from NZ

I’m an New Zealand customer, wanting to purchase accessories. The website states I will be charged in AUD and the product shipped from NZ…I’m already in NZ so why am I being expected to pay AUD and conversion charges for a product already in NZ…can Ring please supply an NZ phone number to purchase from in NZ dollars ?

You can try the list here. Can you order from Amazon? They own Ring and have excellent support.