DTDC Courier & Cargo — Undelivered consignment since 1 month

I have booked a multi-piece shipment of 5 pieces on 7th September 2020 from Jalandhar to Tuni with tracking id: D92359368 under the name of Rishitha Tellakula. I received 4 of the packages but the consignment with AWB no: D[protected] is still undelivered and it's been a month, it's still in transit and hasn't been updated since 7th September. While tracking the next location says delhi apex/North T/S. I have raised many queries, sent emails to customer support. DTDC jalandhar, lpu branch is not responding at all to my messages and calls. The consignment is very valuable so please do the needful at the earliest.