No help for counterfeits

My friends company owns a patent for a fairly simple product. I helped them create a case and flag the companies who are infringing on their patent. Amazon replies back to us and says that our claim is invalid and they take false claims very seriously and threatened to close the selling account. I’m kind of in shock, there’s no forum to ask how they came to this determination, the case got auto closed, and these 8 sellers are still allowed to sell my friends patented product. Anyone else come out of something in a better way? I feel like trademark infringement is much easier for the offshore people to identify but how is Amazon actually identifying other IP infringement? I don’t know how an offshore person can read a patent and be expected to come to a conclusion.