If the manufacturer asks to change or remove the review?

Question

Business Informatics

Hello.
There is a service where people anonymously leave reviews about a particular product.
The manufacturer of the product, which was left with a negative review, is contacted and requires it to be removed. This is motivated by the fact that these are the machinations of competitors who want to denigrate him.
How about:
- if I refuse to delete a review?
- I ask them to pay for it?