Sikkim Manipal University — wrong uias code on my bba degree certificate

Wrong uias code is mentioned on my bba degree certificate, and as mentioned on degree certificate, i visited www.uias.org website to verify my uias code. When i entered my uias code metioned on certificate and clicked on authenticate, it showed it is invalid uias code. Is this some kind of fraud or what? Why my degree is not valid? I have done bba through correspondence smude (Sikkim manipal university distance education) and completed whole process patiently and now when i have finally got my degree, it has wrong uias code. Please check what is going on, as they don't even reply on time when i mailed them regarding same.