Usha Sriram — geyser not working from date of purchase

I have purchased the eurolex endura 15lts geyser on 01 dec 2018. I have registered a complaint to usha toll free number (Complaint no: 92771) after 2 months they have closed the complaint with out providing any service. Again i have registered a new complaint (Complaint no:103256) on feb 2019, till now no one called me from usha. If they are not able to provide the service then why they are selling the products and they are legally looting the money of normal people by selling defected items.