Dealzkart — the product are duplicate so I want to return this products and give my money back

I want to return order reference no. [protected] of combo pack of samsung power bank 25000 mah and samsung 64 gb memory card. Because the dealzkart send me duplicate products and also power bank not working properly. They was not actual product that show in images.. The data cable of power bank not working and memory card is anlso not working properly.. So i want to return this products and give my money back...