Sharp India — refrigerator sharp 596 ltr stopped cooling

Address: A 77, Double Storey, Ramesh Ngr, ND, New Delhi, Delhi, 110015

Dear sir/mdm
We bought a refrigerator sharp, model
Sjpt66r - hs, serial no. [protected], from vijay sales janakpuri, nd in 2012. Still in warranty but cooling has come down to zero. Mailed complaints twice but no response. I put up telephonic complaint with ticket no. 19202295 on 8-5-19. No response. Is anybody listening? Scorching heat and no ice.