AWS Student Account -AWS Cloudfront Service

Hello.

I cannot create a case due to the limitation exceeds.

Does this mean that I cannot open a case with AWS Support from the URL below?
By the way, what kind of error do you get when you try to open a case?
https://console.aws.amazon.com/support/home#/

Usually, you can resolve the error by opening a case with AWS Support under "Account and billing" using the URL above.
https://docs.aws.amazon.com/awssupport/latest/user/case-management.html