Welcome to the exciting world of being published, my friend! You've won.... an illegal download!! But wait!! There's more!! You've won ten THOUSAND illegal downloads!!
There are literally thousands of pirate sites. Some respond to DMCA takedown notices, but most laugh in our faces because they know there's nothing we can do about it. Even the ones who take down your book have it right back up there again within hours or days, at most.
Wait until you run across one of the hundreds of groups on Facebook where people swap our books on their pirate sites!!! And when we complain, report the group, or go in there and blast them all for being pirates and scum, they report US to Facebook!! AND Facebook does NOTHING. NOTHING.
My advice... and I may get flamed for this... ignore it. Seriously. It's so common with romance ebooks that most of us would need a full time job simply to TRY to keep up. Anywhere from thousands to hundreds of thousands of illegal downloads a week for us, from multiple sites.
It sucks great big, sweaty, hairy donkey balls, but until someone in government gives a rat's enough to actually DO something about it, none of this will change. It will only get worse as more and more people realize they can easily get away with it.
I truly hope there's a very special place in hell for people who steal others' work. A dark, scary place, with things that hurt beyond imagination, and keep hurting until the perp is pushed past their limits and then some. And of course, because they'll be dead, they can just keep being tortured over and over and over and over and over again for all eternity.
Lastly, I am SO sorry this happened to you. I know exactly how you feel. (((HUGS))