It is crucial that you contact Westpac IMMEDIATELY if your PCard has been lost or stolen so that they can block the card.
The contact details for Westpac are:
Tel 0800 888 111 (tollfree within New Zealand)
Tel +64 9 914 8026 (call collect from overseas)
You also need to advise the PCard Administrator:
Tel +64 3 479 7686