Consumer Redressal

My complaing is against Shopclues.com which is an online shopping website. MY Order ID:194662565 Return ID:8449031. I had purchased a Swipe Elite Star mobile of Rs.2549 on 6th December 2020 and made the payment online. Yesterday, 9th Dec 2020, I recieved my order. It has a defective battery. I had charged the battery full at 100% and slept at night with zero usage but in morning it was at 6%. So today morning immediately I raised a refund request. Shopclues has a easy return and replacement policy of 10 days. But my return request was rejected by the merchant without any reason. Also when I tried calling their customer care, it only has automated IVR system which informed me that my order is also not eligible for replacement. I had purchased this mobile to gift it to my mummy. Now I feel embarrassed and cheated. Please help me resolve this.