Linking Child account

Im an adult and when creating my account I entered the wrong birth year how do i change this so I can use the account I am obviously not 7 months old.  I tried creating an adult account to pay the .50 fee with y credit card but i continue to get an error.  I need to change the account age or to have it deleted so that I can recreate the account with the username i want.  I am in an area that fax and mail arent options so how can i go about fixing this.  Can the account be linked to my parent account or can it be deleted since I cant get into it anyway. please send me a private message with a solution and so that I can give you the username of that account.