Why hasn't any regulatory authority sanctioned Trustpilot?

We require the assistance of legal experts.
Trustpilot is widely known for engaging in extortionate practices regarding reviews.
Their business approach involves refusing to remove brand names from their site, essentially forcing companies to endure the posting of potentially fake reviews.
By paying Trustpilot, they will eliminate all negative reviews (which may be genuine) while keeping positive reviews (which may be fabricated).
If payment is not made, Trustpilot will remove all positive reviews (which may be authentic) and retain negative reviews (which may be fraudulent).
Why hasn’t any regulatory authority sanctioned such a company?