This will add an admin account to the WordPress database. To do so, you have to be able to run SQL against the database server, so, from your hosting control panel using something like phpMyAdmin.
INSERT INTO `wp_users` (`user_login`, `user_pass`, `user_nicename`, `user_email`,`user_status`) VALUES ('fotan', MD5('password123'), 'Matt Danskine', '[email protected]', '0');
INSERT INTO `wp_usermeta` (`umeta_id`, `user_id`, `meta_key`, `meta_value`) VALUES (NULL, (Select max(id) FROM wp_users), 'wp_capabilities', 'a:1:{s:13:"administrator";s:1:"1";}');
INSERT INTO `wp_usermeta` (`umeta_id`, `user_id`, `meta_key`, `meta_value`) VALUES (NULL, (Select max(id) FROM wp_users), 'wp_user_level', '10');