Myntra.com — regarding returning of the product that doesn't suit the purpose

Address: Bangalore, Karnataka, 800014

Hello,
I had bought a Puma cap from Myntra through its app but the cap isn't suited for use in the scorching sun as it is made of mesh. Talked to customer care executive but denied to take the product back as said that the product was used. The product was tried for the purpose of checking the condition and its suitability and the product is in mint condition. The behaviour of the company is highly unprofessional and uncalled for. How can an online clothing store expect its customers to check the product without trying it? Kindly check into the matter and help me in this regard. Thank you.