[Resolved]  Eureka Forbes / Aquaguard — Annual Maintenence charges

I have purchased one Auqa gurd water pruifer from Eurekaforbes Ltd in the year of 2004 and i have paid the AMC upto 29/06/2009. Every year the company has increased the AMC charges. I have paid for AMC charges of Rs.1740/- for two years for the preiod from 30/06/2007 to 29/06/2009. At the time of renewal of AMC now the company is charging Rs.2050 for for further two years renewal. As an existing customer why the company is charging extra amount for renewal of AMC. Please clarify.