This shows you exactly how to ask Facebook to eliminate reviews from a company Page. Facebook will only delete reviews that violate their Community Specifications.
How to Remove A Review From Facebook
Steps
1. Open Facebook. It's heaven icon with a white "f" in the application drawer.
2. Most likely to the review you intend to erase.
3. Touch the downward-pointing arrowhead. It's at the top-right edge of the review. [1]
4. Click Report.
5. Select a reason. The review will only be removed if it goes against Facebook's Area Standards. [2] Once you select a factor, follow the on-screen directions to submit your request.