Paytm Mobile Solutions — product that I purchase gionee s6

I purchase a gionee s6 mobile on paytm as the as they give me an old product used. I raised an complaint to return but after few days they reject my request. Also the product is very cheap and low of low quality and i want to return please help me and paytm refused to return that product and my money gets wasted please help me as early you can please