Delhivery — Two of my parcels have not been delivered since 20 days now!

I had shipped two parcels on 5th and 7th July respectively. Till data none of these parcels have been delivered by the Delhivery Team. There’s no way of communicating with these people, no way of raising a ticket as it is automatically marked as resolved without a single reply from their end. This is pathetic and unacceptable. I cannot believe that a domestic delivery can take this long. I understand poor weather conditions and some logistical delay here and there. But 15 days? Really? How can one make sense of this? Each day, they keep shifting the estimated delivery date citing poor weather as a reason. How is this acceptable?