You have the full control over reviews on your site. If you would like to delete a review, please use Trash button on the Reviews page in the plugin's menu.
If you enable Trust Badges and opt in for publication of verified copies of all reviews on www.cusrev.com, the plugin will publish verified copies of reviews on www.cusrev.com in addition to saving them into your WooCommerce database. Verified copies of reviews published on www.cusrev.com cannot be deleted because it will compromise their authenticity and undermine trust.
If you disable Trust Badges option, all verified copies of all reviews related to your shop will be immediately hidden and the page of your shop on www.cusrev.com will be deleted.