Nykaa.com — Product received is different from one that I placed order for

I ordered a Monte Carlo sleeveless off white jacket but I received a full sleeve jacket of another company in the box. The jacket is folded and packed into the cap of Monte Carlo jacket so that the product seems to be the original. All the tags and price details are on the cap and there is no tag or seal on the jacket. That jacket is old and used. When I registered a return request in nykaa, they rejected my request by saying that their investigation team found out that product was dispatched accurately. I asked the customer care multiple times that After the dispatch of order how many stops and persons are involved in the shipping, is nykaa not responsible for delivering the product till the order reached at the door of customer. Customer executives replied that they can’t help me in this matter.