My Product Is Being Counterfeited on Amazon! What do I do??

I need some advice. I designed and invented a unique product that I sell exclusively through my website. Recently, I discovered over 100 listings on Amazon selling my exact product at a fraction of the price. They are using my pictures and videos, as well as my company’s name in the titles and descriptions.

This is seriously impacting my business, which is my sole source of income. What can I do to address this?