Oh dear I'm so sorry! I had no idea that was an issue! - I can either send you a free game key for each of the games via email so you can claim them for free. Or I can put some community copies up for you to claim them on here if you'd rather not supply your email. The alternative would be, as you suggested, to claim a refund and then purchase the bundle again with the three games added. I will also reach out to itch and ask them to please change it so that if more games are added to a bundle they are included for everyone who purchased it :)