DTDC Courier & Cargo — Shipment is lost, but status is shown as delivered.

I'm the recipient of consignment X76686277 for Hyderabad location. It should have been delivered by 6th Dec'21, but it was redirected. I followed-up with their customer care, after 3 days, the shipment status went to 'Delivered' on 9th Dec, but I did not receive it. When I conveyed the same to the customer care, they keep telling me to wait for 1 day and they are checking with Balanagar branch. On 11th I went to the branch, but they did not find the shipment and keep telling the same story that they'll find it soon. The shipment has my bank cheque book and my flat registration is getting delayed, because of this.