Flipkart deceived me

Marq by flipkart is owned by flipkart. Do not buy marq product. They will not mind you if anything happens am a victim of marq brand. I bought 2 air conditioners and got a defective one failed in one month they didn’t doing anything every time i call customer care they raise a complaint and no response after two days i will again call them they will tell me my complaint canceled by company this is happening for months . am started complaining this on jan 27 2019 . I have received this product on 26 dec 2018. Very bad customer service. What should i do? Ican’t use the ac now its not working. Flipkart customer care exicutive told me they have nothing to do