DTDC Courier & Cargo — Item not delivered by the coimbatore branch since one month

Sir, my courier reference number is Z34771966.
My item has delivered from Mathura on 28 Jul 20. My courier has received at coimbatore on 31 Jul 20. I have called 100 times but no response by the dtdc staff. I have lodged online complaint but no response. They have told me two times to deliver the item but he has not delivered.