Check this story out,
http://www.nzherald.co.nz/business/news/article.cfm?c_id=3&objectid=10723201
"Internet provider TelstraClear kept a long-term customer on a plan with rates nearly 10 times higher than those offered to new customers.
For several years, the 2CLight company of Christchurch has been on a TelstraClear internet plan that charges about $20 for every gigabyte used over the monthly usage limit.
The telco's newer customers pay about $2 for every extra gigabyte used.
2CLight chief executive Simon Dyer has written to TelstraClear boss Allan Freeth, demanding a refund of $2470 - the amount he calculated as the difference between the rates in the past year."
Surely the customer is a moron for not monitoring that he was on the most appropriate plan?
He then goes on to say that slingshot is a much better deal. Good luck with that.