Unfortunately, that account is fried. You were a minor when it was opened and can't enter into contracts legally so not sure if you're even entitled to that money. You can open a new account when you turn 18.
Contact customer service for assistance:
Click HELP at the top menu, scroll down to click CONTACT US, and then scroll down to click CALL US.
Call early, during business hours, west coast time to try to get a US rep. Say "Live Agent" to the automated recording.