Thank you for clearing that up.
What you need to do is send a certified letter to DeVry that tells them that if they do not pay within 30 days of the letter you will file a lawsuit.
The letter would say:
I am writing to demand immediate payment to me of a refund owed on my student fees.
Specifically, I am owed __________ as a refund for overpayments I made to DeVry University. I have attached a copy of the documented account history which evidences that this amount is owed to me. Further, I have previously submitted a claim for this refund through the University's administrative offices. You have refused to acknolwedge the same.
Accordingly, please take this as notice that if I am not paid ___________ (amount owed) within 30 days of your receipt of this letter, I will have no other choice but to file litigation
against the University to seek my damages.
You may make payment by sending a check to ______________________(your address). Please contact me to confirm your agreement in this matter.
Then, if they do not pay, you have to sue. That is the only way to force them to pay you back.
How much is the refund that they owe you?