This morning my wife discovered five printed coffee mugs for sale on Amazon listed by "DealSmileMugs" printed with five of my MBA designs. The images were identical to mine, including my signature which I always put on each design. And the mug product title even had my brand name in the title. (My MBA product titles always begin with my brand name.)
We are going through the convoluted official process to report them but you might want to check to see if any of yours are in there also. This seller "DealSmileMugs" appears to have thousands of printed mugs for sale on Amazon so I'd be surprised if I am the only MBA designer they are taking art from.
There is also another seller named "Nana Store" which is doing the exact same thing as "DealSmileMugs" but they've taken only one of my designs so far. You might check their listings also for your designs. When you are searching, be sure to put "Nana Store" in quotes in the search box.