That sounds very strange to me. I can be wrong here but in my 8 years of experience with CIC, I have never seen a refusal letter that says check the details in your email. You should call CIC and check the authenticity of the rejection letter. Any message or email or letter they send atleast contains your application number if not UCI.
Oh wait a minute, when you applied for your visitor visa, they must have sent you a refusal letter for that application or an email to notify you about the decision. That particular document will have your UCI number and your UCI number stays the same for rest of your life. (On side note, UCI is unique ID given by CIC to an applicant - so only valid/useful for canada immigration applications).
So, find your UCI number from your old visitor application file. Then call the CIC call centre and provide all other personal details of yours - ask about your recent application. Explain them the situation. If one representative doesn't give the details, call again. Someone will be able to help you atleast. Don't lose hope. You can always try to present your case.
@Wonderland_1010 have mentioned about the 5 years ban and the fairness letter. Yes, if they end up finding the misrepresentation then it is not good for you. In your case, I suspect you didn't mention about your visitor visa refusal in your student permit application. Did you ? If you didn't, then my next question is - was it you who forgot to provide this piece of information to your agent ? Or you did provide them but they never entered it in your study permit application? If you never mentioned it, then you are at fault. I don't know how it happens in India like how many days they give you to present your case but my dad just got 10 days to explain his misrepresentation - he applied from Italy.
