Past Employee Left Slanderous Review
Past Employee Left Slanderous Review[ Edited ]
November 2016 - last edited November 2016
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The first step in getting a review removed is to determine if it violates Google's Terms of Service. Google doesn't arbitrate truth or personal disputes and only removes reviews that are in clear violation of these rules: https://support.google.com/business/answer/2622994?hl=en
The second step is, if it violates one of the rules above) flag it (when you cursor over the review a flag will appear). See instructions here: https://support.google.com/business/answer/4596773?hl=en
The problem in this case is that even though you might know that this is an ex employee which might constitute a conflict of interest, it is not clear from the review that is the case.
Thus it is unlikely that Google will remove the reviews.
Your best bet in a situation like this is to ask your customers for more reviews to bury what is now a very old review.
You could pursue a legal strategy through the courts but that is expensive and not often very productive.
PS As a note I did elevate to Google on the basis that it appears that two different reviews were written by the same person. I wouldn't hold your breath.. Given the situation Google is unlikely to do anything.