Wipro — Rejected candidature

I have been waiting for my onboarding mail and filled out my joining forms which showed my joining date as to be September 28 but all I recieved was my rejection candidature mail. I don't know why they are rejecting our candidature after 5 months. Not only me but a list of other students too get scammed by them. Because of them we haven't accepted any other job offer. And we have done they asked us. Even filled the night shift from and all. Cleared the background verification process also. At the end we have is an rejection mail