Adidas — Complaint about the order no.[protected]

I had ordered a pair of shoes from shop.adidas.co.in on 2nd of June that costed Rs. 6, 599. At first, the product was okay. But as days passed, the outer cover of the shoe started distorted which looks completely poor.This is definitely not the product we expect from adidas for such amount. The shoe quality is worst. I had lodged a complaint on their mails and they haven't picked my return successfully till now. If I ever return that, I, now doubt of not getting refund. This is very bad experience to me and a loss of money for such bad product.