Adidas — slippers replacement

I bought Adidas make slippers from Adi Sports Gaur Central A-1 to A-4 RDC Raj Nagar Ghaziabad on 9-3-18 vide bill no. S884-T1-SC3172 for Rs 2999/-
At the time of buying your salesman told me that these slippers are very durable and comes with 1 year free replacement. On this assurance I bought such costly slippers. After using them for 4 months these slippers started tearing. Today I went for replacement but your team denied to do so.