Override Woocommerce Email Template

Hi,

Want to override Woocommerce customer-completed-order.php plain email to make it just simple easy text.
I made a directory in my Child Theme: astra-child/woocommerce/emails/plain/customer-completed-order.php, but still Woocommerce sending old style email template.

Here is also code what I put in my Child Theme file:

<?php
/**
 * Customer completed order email (plain text)
 *
 * This template can be overridden by copying it to yourtheme/woocommerce/emails/plain/customer-completed-order.php.
 *
 * HOWEVER, on occasion WooCommerce will need to update template files and you
 * (the theme developer) will need to copy the new files to your theme to
 * maintain compatibility. We try to do this as little as possible, but it does
 * happen. When this occurs the version of the template file will be bumped and
 * the readme will list any important changes.
 *
 * @see https://docs.woocommerce.com/document/template-structure/
 * @package WooCommerce\Templates\Emails\Plain
 * @version 3.7.0
 */

defined( 'ABSPATH' ) || exit;

/* MY FILE */

echo "Zeus Ecolighters";

/*
 * @hooked WC_Emails::order_details() Shows the order details table.
 * @hooked WC_Structured_Data::generate_order_data() Generates structured data.
 * @hooked WC_Structured_Data::output_structured_data() Outputs structured data.
 * @since 2.5.0
 */
do_action( 'woocommerce_email_order_details', $order, $sent_to_admin, $plain_text, $email );
remove_action( 'woocommerce_email_order_details', $order, $sent_to_admin, $plain_text, $email );

/*
 * @hooked WC_Emails::order_meta() Shows order meta data.
 */
do_action( 'woocommerce_email_order_meta', $order, $sent_to_admin, $plain_text, $email );
remove_action( 'woocommerce_email_order_meta', $order, $sent_to_admin, $plain_text, $email );

/*
 * @hooked WC_Emails::customer_details() Shows customer details
 * @hooked WC_Emails::email_address() Shows email address
 */
do_action( 'woocommerce_email_customer_details', $order, $sent_to_admin, $plain_text, $email );
remove_action( 'woocommerce_email_customer_details', $order, $sent_to_admin, $plain_text, $email );

Thank you for help.

Kind regards,
Danylo

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