Requesting Attested Degree Certificate from Bharathiar University

Hello, Everyone. I graduated from CMS college in 2016 and require an attested copy of my degree certificates from Bharathiar university. Does anyone know the procedure to do so ? I have some specifications as to how the copy should be. I even want the stamp and signature on the envelope. My college said they can do it in a week's time, but I need it from the university. Anybody know how long it is going to take ? Appreciate your help in this matter.