It seems the online payment service option is unavailable...
http://www.telstraclear.co.nz/customer-zone/payment-and-billing/pay-your-bill/
Service unavailable!The server is temporarily unable to service your request due to maintenance downtime or capacity problems. Please try again later.
If you think this is a server error, please contact the webmaster.
Error 503www3-server.telstraclear.co.nz
Wed Dec 28 10:06:24 2011
Apache/2.0.59 (Linux/SuSE)