DTDC — Courier not delivered and is being returned

Address:

House No. 4-8-9 , second floor, Opp. Police Station, Chowrasta,Hanmakonda

I sent a courier through DTDC C/n no.H20898443 on 10th October 2020 from Warangal-506011 to Delhi 110032. I have contacted the recepient and he said he didn't receive my parcel. So I went online to track and it is showing as "Not Delivered(ADDRESS INCOMPLETE OR WRONG-(CIR))". DTDC tells they will deliver within 5 days and till now they haven't delivered it. Now my parcel is coming back to me and they haven't informed me even once about the delivery issue or returning process. Now the status is shown as "RTO Process Is Initiated". I have even sent a mail to their website but haven't received any response. These private courier services are the worst. I want my courier to be delivered to the receipt asap.