We sell esports merchandise (t-shirts, hats, etc) with our team logo, and there's a lot of counterfeits out there trying to use our brand on print-on-demand sit

We sell esports merchandise (t-shirts, hats, etc) with our team logo, and there's a lot of counterfeits out there trying to use our brand on print-on-demand sites (Redbubble, Zazzle, etc) and generic shopping sites like Alibaba and Amazon. Out of all the sites we've investigated and sent takedown notices to, Amazon has by far been the worst. The marketplace is full of counterfeit products, and we've been having a very hard time trying to get them removed, even though we have copyright over the design and trademark on our brand name. Quote Amazon on our latest batch, "We respect a manufacturer's right to enter into exclusive distribution agreements. However, we do not help to enforce these agreements. This is a matter between the manufacturer and the distributors.".