You may need to contact you relevant customer service.
Your ebay account is registered in NZ so NZ bank account should not be of concern.
However ebay NZ, falls under ebay.com (eCI) ebay commerce inc, which uses US$.
Whereas this forum, is related to ebay.com.au (eCA) ebay commerce Australia, which uses AU$.
If you are now residing in Australia, you may need to commence a new account. In which case the NZ bank account may be an issue.
Note: ebay.com also have their own forums.
