Kenstar — Not cooling and water empty beeping sound even though water is full

Address:

New Delhi

Hi,
I purchased Kenstar cooler glam50R last year. Even though the water is filled completely, the cooler has the red empty water sign and makes a beeping noise when cool button is pressed. After a few seconds the cool light goes off and it only throws warm air.
Kindly help to fix this issue or replace the cooler.
Tried calling customer care but to no help.