DTDC Courier & Cargo — didn't receive product

Address:

Thiruvananthapuram, Kerala, 695505

I had booked a courier on 24th from banglore. When tracking, its showing that product had reached trivandrum yesterday and then returned today. I didnt received any call or msg from dtdc.Also the destination location is neyyatinkara. When I enquired there they said they didn't received that courier.How they can return my courier without sending to the destination location? I need that courier back and the amount I had paid for.Does it take 1 week to deliver a product? Another thing is while trying to contact dtdc for enquiry no one is attending the call. When I call for enquiry @neyyatinkara they had given number of trivandrum branch. When I called them no one is attending the call.What i need to do?