Need broadband too? Do you or anyone at your address depend on electricity for critical medical support? Business existing customers: 0800 006 700 Business sign ups: 0800 006 330 Other ways to get in touch: Emergency telephone: (09) 528 1800 Overseas callers: +64 4 528 1800 TTY and Video Relay assistance is available for the deaf and hearing impaired via NZ Relay on 0800 4 711 711. Track energy and utilize energy resources to save .