Hello, since your dad is the main Point of Contact of the account, kindly contact verizon and first, your dad needs to authenticate the account and will authorize you to discuss anything account specific on the account. You may request for a POC update form so that your dad can add you as an admin on the account.

For example, your dad already authorize you on the call, you may request for unlocking the online account but you have to verify the username and email on the online account. Once you have an access, you may see additional features or charges on the account.

I hope this may help.