sir we are service provider and are providing MAnpower service to most of the Govt and MNC'S , we are authorise firm will all legal documentation required for this business . one of the case of our client which is a govt organization . during 2006-2007 for around 6 months the party has payed us service tax on service charge i.e on receipt amount and not on the gross bill after the scrutiny we demanded them to pay service tax on gross bill which they agree later .but yet have not received the differential amount for this six month . we have contineously demanded them throug letters but yet have not got their reply . orally they are telling but are not giving us in black and white. ST dpt are forcing us but they are not taking into picture the company or any legal action against company .