Reliance Digital - Defective refrigerator delivered

I had purchased * refrigerator from Reliance digital, Attapur. After * month, cooling function stopped, when I did complain their mechanic told sensor is damaged, they will replace, after some days they replaced, and they told me put a stablizer, also I purchased that for refreigerator. After that again same problem faced, ice was not released, again complained , their mechanic told put in lo cooling, but there was no result done. After that again we lodge complain, again mechanic came and told us again to change sensor. We are very lower middle family. We want to get judge, to get my money or a new refrigerator.