DTDC Courier & Cargo — package not delivered and tracking details not updated

Hi
One of my package from consignment id D50719688 is not delivered yet. I booked almost 128 kgs of parcel costing 15000 on 24th may from bangalore to guwahati. I thought dtdc is good for their courrier services, but among them one package is mistracked. I enquired the bangalore ejipura branch for almost 3 times but they also can't provide me any details. I am really very disappointed and in tracking it shows last update on 31st may only in patna hub. Please enquire the matter and deliver my package asap.