There is a quick way of unlocking your user account again by reassigning a new password to your own username through code. You must have the correct permissions when connecting to the database so if you have for example the APPS credentials than you're good to go.
Connect with the EBS database using the APPS user and run the below code snippet to Unlock the user account. Of course change the values of the parameters username and new password to fit your needs.
status := FND_USER_PKG.CHANGEPASSWORD(username => '<your username>',
newpassword => 'welcome123');
DBMS_OUTPUT.PUT_LINE('Password changed and user unlocked');
DBMS_OUTPUT.PUT_LINE('Error while setting password');