Recently (just 1/2 months ago) I have received a 1-star review that was removed from my profile by Customer Support. I was amazed but things like that happen.
The buyer ordered some simple, easy, and fairly cheap work. I completed everything as we discussed and after 3 days the order was marked as completed. Few seconds after that, bum, 1-Star review. It turns out that she requested some minor revisions but her messages never went through and I didn’t receive anything. No messages were visible on any device or browser.
She also contacted me on the Inbox about that (which is convenient because I didn’t need to do that and risk violating ToS). She was super upset but I kindly explained everything to her and tried to be as professional as I could. It turns out that those minor revisions meant a lot of additional work. Sadly, in this situation, I felt a little bit blackmailed and to not complicate the situation, I just work on all the changes she requested and after a little back and forth, she was very happy with the results.
IMPORTANT: I never talked about this review with the buyer. Even if she mentioned it, I just skipped this topic. You better be careful in situations like that. (the whole feedback manipulation thing)
So, the buyer is happy - that’s great, now it was the time for me to be happy. I contacted CS, sent them a super long ticket with all the explanations and screenshots. Surprisingly, someone actually read it and understood my perspective. Since the reason all of that happen was a Fiverr technical bug (revisions messages don’t come through), they just removed this review from my gig. Happy ending.
Maybe the OP can get something from the above but personally, if it’s about 3 or 4-star review, I would leave it as it’s. It’s a shame but it’s what it’s. Sometimes it might be risky to even talk with CS or use certain phrases.