Delhivery — My product valuing 20,000 is untraceable by the company.

I had an product from amazon which I had to return back to amazon. But amazon couldn't pickup the product so they asked my to self return the product. I did self return the product via Delhivery, but now I get an email from Delhivery that the shipment is untraceable. Shipment was worth 20, 000 Rs. And I am really really worried I cannot afford to pay this amount. I won't get a refund from Amazon if the product does not reaches the seller.