Cannot access Adobe Illustrator after buying a subscription through College Buys

Did College Buys provide you with a redemption code or link to activate your subscription? 

I think that’s where you must start. 

Do you have more than one email address?

Did you provide the required information to Adobe?

Start at http://www.adobe.com/education.html
-The FIRST step is to verify that your school is accredited
-FAQ https://helpx.adobe.com/x-productkb/policy-pricing/education-faq.html

https://www.adobe.com/offer-terms/student_teacher_eligibility.html

-Cloud Education Plan https://creative.adobe.com/plans?plan=edu

http://www.adobe.com/creativecloud/buy/students.html

-One Year Intro Price https://community.adobe.com/t5/account-payment-plan-discussions/why-is-my-account-now-31-a-month-and-not-the-20/td-p/8862330

check your account, https://account.adobe.com 

does it show any subscriptions?