If a customer leaves a review you feel is innappropriate, you can flag the review as inappropriate. Atlassian looks at all flagged reviews at the end of every week.
To flag a review, go to the review section of your listing, scroll to the offending review, and click the Flag as inappropriate link:
This then drops into a queue that the Atlassian Marketplace team reviews each week. If the review has not been removed by the end of said week then this generally means that we don't believe the review is in violation of our review policy.
When a review is deleted the score as well as the text is removed from the listing. This will affect your overall star rating.
The review rating left in a review can't be altered, only deleted.
If you feel a review was left by a competitor, or a Vendor has reviewed their own app, then please raise a ticket with the Atlassian Marketplace team so we can investigate this further.