Blue Dart Express — delivery not reached

I am supposed to receive two eyeglasses from lenskart which were supposed to be delivered through bluedart. I have received one but the other has not been delivered. The webpage says that delivery has been attempted four times but there was no consignee at the address. How could they deliver one perfectly well and not be able to deliver the second one? I have not received any intimation before the delivery and not even after they could not deliver. The reference number is #[protected] and please deliver it as soon as possible.