I opened an account in October of last year. I received an Apple iPhone 4S and then 3 days later returned it for a Galaxy S3. I was recently trying to upgrade my phone but they said the upgrade had already been used when I returned my new phone within the 14 day return policy. Why did that count as my upgrade? Now my account says I can't upgrade until months after my plan ends. I would like to upgrade. Thanks for your help.