Judging from the cyrillic characters, this is either a Russian or eastern European site. I think y'll will be pretty much 'shit out of luck' as they say around here. They are prettyunregulated as far as intellectual property and copyright laws and snag whatever they want with impugnity. If you can get hold of their ISP, maybe something can be done but it can be dicey - good luck!

BTW - this is why I water mark all of the pieces I've sold prints of - or hope/expect to - to protect my patrons' rights to exclusivity. They pay a premium for a limited edition print and it wouldn't be good to have their print show up all over the place. Sort of defaces the images a bit but what can you do?
Rick