This has happened to me when I was a student. I didn't understand EC2 billing cycle well enough and ended up using much more than my student credits. The final

This has happened to me when I was a student. I didn't understand EC2 billing cycle well enough and ended up using much more than my student credits. The final bill amount was high as a student (but still less than $1000). Contacted AWS support, they waived the charges but cancelled my account and told I couldn't use that email address anymore for AWS.