Eureka Forbes — Providing low standard filters

Every year your representatives used to come for changing the filters to my RO Water filter and inbetween they used to come for checking the purity of the water.
On 24.02.2015 they changed the four filters and installedthe new ones, after changing the filters the water was nice.

This month we experienced water was not pure and fortunately the technician from Eureka Forbes has come and asked us for checking the water with a meter and checked and found the meter showing 198, then he asked us to change the filters. We agreed to and changed the filters costed me Rs.4190/- I gave a cheque dated 02.03.2016 for the said amount.
My complaint is filters not working for a period of 12 months. You are requested to advice.