Store selling name brand under their own brand name and listing title and picture mention the real brand name

Seller is listing already branded names under their brand. Example: selling original 3M products under their brand name and then reporting another seller who lists the item in their inventory as counterfeit. Then Amazon dings them because they say it is brand protected by fake brand. Already contacted amazon several times and noted seller has hundreds of real brand items listed under their fake brand. Amazon does not nothing about it and the dishonest seller locks up all the sales because they are the only ones who can sell it.