Sigma Manpower Services – beware big cheaters in mumbai

i subscribed for manpower service for 2 yrs with sigma manpower, they claim to be in this industry from 15 yrs. i was supposed to get unlimited manpower from them for 2 yrs. it is already 8 months and i have not received a single person from them. i know atleast 4 more people who have been cheated by them in the past. they never say no . it is always that we are trying.but there is no result from them till date. they have started cheating openly. i really would like you to take a look in this so they atleast more people dont get cheated. they give ads in the paper everyday and more people get in to their clutches. please help.