Here is a list for companies that might prove of some use.
Vodafone Internet "977"
093578028 also 095375656 works which used to be a vodafone number!
in saying all that there is NZ Direct access numbers and apparently the'll put you through to any telecom department from anywhere in the world for free a mate was saying.
Does anyone have any ideas? I'll remove the above numbers if they are of an issue.