Intargos — Received completely different products

Website:

indiashoppings.myshopify.com/81922326819/orders/b4b7abbfd942bffa728d1333f57be298?locale=en&gid=5459793576227

I ordered cargo pants from the company but received a completely smelly and useless shirt. I paid Rs 999 and I want my refund or else exchange for the same.