To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyses reviews to verify trustworthiness.
Because in spite of many interactions with amazon's team, I didn't recd cashback of Rs. 250 (Offer: Shop with Amazon Pay Later & Get 25% back up to Rs. 250). I am very disappointed & returned this product.