Eureka Forbes — eureka forbes uv model installed in nov 2019 not working

The light blinks but stops immediately. No water is flowing into the container. This uv model eureka forbes water filter is used by my parents who are above 90 years old. Item was purchased in nov 2019.
Address of installation is
P. Srinivasan,
E1, venkat apartments,
88, srinivasa raghavan street,
R s puram coimbatore 641 002.
Ph:[protected].
Preferable time to attend is before 11 am or after 1 pm. They do not use mobile phones and hence you can contact me, his daughter malini at +91-[protected] or his son giridharan at +91-[protected]