When you receive a review on the Zibbet Marketplace, you will receive an email to let you know.
You can view and manage your reviews directly on the Zibbet Marketplace, via your shopfront.
Here's an example from the reviews page of AllAboutTheButtons:
As you can see, you can "Report" any reviews, which will go directly to Zibbet Support. If a negative review is received, you will see an option to respond to it on this page too.