I got my renewal notice last week. I use Waste Management (in Whanganui), and my cost had gone up to $577 for a 240L general waste bin for a year.
I had a look on their website, and it was showing a price almost $70 less for the same service.
I contacted Waste Management and asked why I was being charged more than the advertised price, and they said I was on an "older service agreement" which is more expensive. I've used them for 3 years. I was told I had to cancel the service and buy it again to get the lower price.
Not impressed!