Day 0: - I had almost 100 reviews on my app. Most of them were 5/5. And chrome webstore was showing full five stars for this app.

Day 1: - A guy (with empty profile) posted a 1/5 rating, claiming that my app is not safe to use. And interestingly only the same day, I got more than 20 new 1-out-of-5 ratings, and none of them had any text reviews. Generally I rarely get less than 5/5 rating, you can check from the below link.

Day 2: At Day 1's end, I posted a reply on the guy's review that my app is safe, and you can contact me on the given ID. Next day I woke up and saw, his 1/5 review starting with "Avoid this app" is on the top, and my reply was completely removed. Which can only happen when lot of people click on mark-as-spam.

So, I need help from you guys. I do not have any contact at Google, and even if there was not sure how much they can help. Any suggestions what should I do next?

Note: We can discuss this later/seperately, but my app is 100% safe and I am an ethical developer.

https://chrome.google.com/webstore/detail/sticky-notes-just-popped/plpdjbappofmfbgdmhoaabefbobddchk/