eBay.in, India — Short shipment claim

Ordered food processor attachments thru thear on line Web site the product data sheet clearly said cocunut scrapper was inincluded.How ever on receiving the shipment found the iteam was short shipped The Vendor on phone admitted it is a mistake after my proving with product data sheet now easy asking info bit and peaces and delaying resulution I have sent photo graphs, specs sheet etc but each time they take turn around time of 48 hrs kindly help to get the short shipped iteam