EOT Demotion Level – DELETE

I need users are signing up with Level 1, demoted to level 0 after EOT (free subscriber)
but level 3 or 2 are removed.

Looking forum , found this hook but failed to properly modify.

---

Create this directory and file: /wp-content/mu-plugins/s2hacks.php

<?php
add_filter('ws_plugin__s2member_force_demotion_role', 'my_demotion_role');
function my_demotion_role($role = 'subscriber') {
	if (current_user_is('s2member_level3') || current_user_is('s2member_level2'))
		$role = 's2member_level1';
	return $role;
}

---

a serious option?

if active in “Automatic EOT Behavior”
“Delete (erase Their account completely)”

and change the hook

<?php
add_filter('ws_plugin__s2member_force_demotion_role', 'my_demotion_role');
function my_demotion_role($role = 'subscriber') {
	if (current_user_is('s2member_level3') || current_user_is('s2member_level2'))
		$role = 'delete';
	return $role;
}

as I call “delete role” in programming ?

sorry for my English.