We work to delete fake, misleading, and unfair reviews from Yelp®.
Whether it be an alleged competitor, ex-employee, troll, targeted attack, or something else... we can certainly work to have it permanently removed from the platform.
If it's on Yelp®, there is a very good chance (97%) we can get it deleted - even if you don't have a clue who the reviewer is and you don't have any evidence.
In the rare case we can not get a review deleted, you can always go the "Disappear" route which has a 99% success rate.