I'm not sure what the ab circle pro New Zealand number is, but you could try calling "The TV Shop". Check your phone book.
I wrote a detailed ab circle pro review that explains what the machine is all about. Basically a ripoff, especially when you compare the results with the claims in the informercials.
I've got an article on ab circle pro that explains that the $15 is just for a 30 day trial. If you don't return it within that time you will get charged 5 times $39.95 for a total cost of over $200.