[Resolved]  Eureka Forbes / Aquaguard Reviva RO System — About servicing

Dear Sir/Madam,
I have purchased a water purifier from kocher enterprises Contact no.[protected] bikaner (rajasthan) on 23/10/2009.On completion of three months one of their servicing rep came to my house for servicing.He has only emptied the transparent chamber and cleaned it by a cloth and fitted back.when asked about the sediment filters cleaning,he cleaverly made me understood that no filters to be cleaned in servicing.Interestingly when i enquired to my friends who have taken the same plants they told that the same rep cleaned their filter too.I want to conform from the company,what is the correct proceedure of subject servicing ?
My contact as follow.
Mob:[protected]