Hello
College students can only discuss with the school, there is no other way! Once you’ve applied for a credit card, it’s best to keep it in case you need it in case of emergencies. If you really don’t want to use it, just call the customer service of the credit card center and ask them to cancel the card.
Generally when you apply to cancel your card, they will advise you not to cancel it, but as long as you insist on canceling it, they will help you do it, and you can ask them to cancel it on the phone.