Whaaky.com — Not responding to multiple emails

Hi I had ordered a Sony Power bank from Whaaky.com. Order Placed on :[protected]:19:38 Below is the order details. Dear Rohith Shet G R Your Order ID : S80882071 Payment Mode : COD Order Placed on :[protected]:19:38 where they sent out a MI power bank. with no warranty. I had sent several emails to get it replaced, but my email went to drains. No response till now. Can any one let me know how to deal about this?