Is it Amazon’s policy that you can use someone’s else’s artwork and sell it???

Is it Amazon’s policy that you can use someone’s else’s artwork and sell it???

I am extremely frustrated because Amazon keeps rejecting my IP report. It is MINE. I have provided screenshots of the source file, signed under perjury that is it MINE, I have provided links to where I AM SELLING my OWN work and they respond with:

Thank you for your report of infringement. We [looked at] your notices of infringement and determined that the notices you have submitted to Amazon are invalid or inaccurate. Reporting false, misleading, or consistently inaccurate notices of infringement violates our policies.

Do I need to get a lawyer to stop Amazon from profiting off of MY work??

What is the next step here???