Porter — Missing Parcel

I had booked an packers and movers service on 13th from Ghaziabad to Kanpur, in this order I had booked 3 layer packing but they had packed only in foam sheet, during this order 2 of my parcels were misplaced out of 1 found near service lift at my old location and another one is still not found. Their service partner is saying that they can take responsibility for the material loaded in their truck.