Sonovision — crompton air cooler not working

Hi this is M.Kali vara prasad purchased Crompton Air cooler from your sonovision showroom which is located in Eluru road vijayawada dated 12/04/2019 vide invoice no. SVN SL-567. My complaint is that, cooler is not working. I have taken it two months back and one year warranty is there for it . I am calling your branch and there are not responding properly(There are not lifting the call only). Kindly solve it as early as possible.