Remove or delete a review from my iTunes app? How can I remove a customer review from my App in iTunes?

I sent a message via Report a Concern and nothing happened.
Reporting a concern is the only way to attempt to remove a review. The process is not instant and requires manual approval. If you've only just sent the form, wait a bit. If it's been a while and the review is still there, it probably means that someone has reviewed your complaint and declined it.