Accenture India — about my degree from magadh university

Address:

Brigade Metropolis (City Bank) , summit A, garudacharpalya , mahadevpura, 560048

I was done with the selection part in for accenture as interview was cleared.. But since they have blacklisted magadh university they closed my candidature, i want to know if there is a issue, why don't they take legal action instead of rejecting the degrees which are not fake. Due to some instances all have to suffer. Or they just check at least each student is not carrying fake certificate, no one knows any university registered by govt, suddenly involves in some false activities, and all companies suddenly stop hiring students from that university why? If anything happened, obviously they would be investigation and accordingly the people who were involved they should get the punishment not everyone.
I am really disappointed. Because now i am afraid i can ever join any company. I want answer if anyone can give.. What was my fault in that.