MY LEGO IDEAS PROJECT GOT STOLEN!

I recently submitted a new idea that was rejected due to photo quality. In 8 days, another account (with zero previous projects and no contact information) published a nearly identical project. Given the timing and very specific similarities, I am pretty sure that someone managed to see my project and made a fast 3D copy of it. I also want to note out that my project is based on an IP, and no one has ever built anything like I did, I have checked it because it was important for me. This IP is...