Sreeleathers — poor quality- request to change

I bought a synthetic footwear from the sreeleathers store at asansol dt.[protected]. I used the product less than 12 months but in optional and thendt[protected] i observed cracks on the sole. I thought of exchanging the product, but they unable to replace or repair this product. Is it sreelether goodwill i like to purchase from sreelether but i found the quality going down than previous i request to you to replace or repair
Mob.[protected]