DTDC Courier & Cargo — My Consignment is stuck at Patna no one is taking any action

I booked a very important consignment through DTDC Courier at Ujjain on 28th July 2021 and they confirmed that Courier will reach at DEHRI ON SONE DTDC Branch by 28 th July 2021.
My Consignment reached in Patna on 28th July 2021 and they put on hold by saying that this is outbof service area.
I would like to ask if this are was not serviceable then why they booked the Parcel they have to denied on the time of booking but there is Branch of DTDC in Dehri on Sone Bihar pin code 821307.
No one is ready to take any action and customer is suffering badly.
I am continually following up asking call raising queries and writing mail but no one is listing, even I write mail to their MD.
So careless and Lazy people I did not see in my whole life.
All the time they ask only about address but no one take any action for solution of the complaint.