Free book download sites, amazon, pirate sites, illegal, www.amazon.co.uk, kindle, kobo

Beware the free e book download sites. I have found one or two that have had my books available as a free download without my permission. One reported to have already given away 638 copies! After receiving an angry email from me threatening legal action, they took it down but I have not seen a penny from the sales :( I wouldn't complain but I'm not famous or wealthy :( If anyone has gained a free copy, can I please ask, that as a courtesy, can you please at the very least, leave me a review on amazon so that I have something to show for all my hard work.