review-order.php file adding text twice

I want to add a little warning about VAT and custom fees on the checkout page.
So I have just added some simple HTML to the “review-order.php” file in my child theme.
Like this:
https://ragnarok-film.com/wp-content/uploads/2018/08/thecode.png

But the text is showing up double, anyone have any idea why this is happening and how to fix it?
Like this:
https://ragnarok-film.com/wp-content/uploads/2018/08/theresult-1.png

Thanks in advance

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