DTDC Courier & Cargo — undelivered product

Address:

Ranga Reddy, Andhra Pradesh, 500084

I had a product couriered through this service on 23 march 2018 from hyderabad to bengaluru. It's over a month now and it's not delivered. When i mailed them they told the prodct has not been received by dtdc. I mean, if they haven't really received it. How did i get the receipt proof of that? (Attached below). Nobody picks call from the regional office. The product worth was around 3000 rs. Are they going to refund the money or provide the proper info on the product. I am not even able to track the product as it's showing no data available as status.