Looks like an amazon-type retail site from...the Netherlands? Who knows? A lot of places like that list books and other things for sale on markup, and run the purchases to Amazon, B&N, etc. Or so I've heard.
Celeste, do you upload straight to KDP or do you have an ebook distributor? I'm talking anything from a company that does specifically that to Smashwords.
If you're only uploading to Amazon or very specific channels, it may be prudent to run a test by buying a copy from this bol.com and seeing if it shows up as a sale in your KDP. If not, that's a major problem, specifically illegal sale and distrubition of your ebook.
Wow, Celeste!! 3000 times! INFURIATING!!