Cancelling an old account - unsure of email associated with it

Hello Adobe Forum! Hopefully you will be more helpful than the people who don't answer my call or the robot who doesn't help on chat! 

I had an adobe account in college that my parents were graciously paying for. I have since graduated and am now an adult who pays for my own adobe account. However, they are still being charged for the old one - I tried to login in with my school email and any other old email I used but it says that none of those accounts or active or anything is being charged. I just have one account active and it's being charged to my card. Can anyone help me figure out how to help my parents get this charge canceled officially? It's apparently been going on for several years which is quite frustrating! I love the product but not the hassle that comes with the accounts!