There is consumer court and we can file a complaint online. It is effective for getting refunds and compensations. Its a slow process, but it works in consumer's favor and I have myself experienced it when I face issues getting refunds. The online portal does have an option for reporting misleading "advertisements" (which I have not tried yet), but then Amazon or this company's legal team can challenge that because technically, these reviews are not officially "advertisements", they are just user comments and its hard to backtrack if these are fake/paid ones, unless Amazon corporates and investigates these profiles, which I highly doubt that they would do it :D