Blue Dart Express — tracker says delivered but there is delivery made at my office

Address:

560078

Waybill: [protected] & [protected]

There are 2 items to be delivered. The address was my office one, as my office is closed on saturday there's no one to accept the delivery. On saturday 16 feb evening at around 7:30 i got 2 sms saying my order is delivered. When i checked using the online tracker, there it says delivered to self. As there's no one in the office to confirm i waited for monday to check if it really delivered. On monday, when i inquired with office front desk/reception there's no entry for saturday deliveries in the log book. How can you guys deliver items without checking a valid id? And how can an item be delivered, when there's no one there.