Mahadev group - Fake product delivery that was not ordered by me

I never ordered this cash on delivery order product which doesn't have seller information and details,expect my name ,address and phone number.But I collected the parcel, thinking that as it was the parcel from flipkart,which was supposedtobe delivered tomorrow(*/*/**) has been delivered today(*/*/**),as it was also cod product with same amount.But when I opened i was shocked to see,this wasn't the product,and it was a brocken sunglass,and there is even no seller details available on the product.I want to return this order and want refund. Please help me.