Facing delay to providing support when someone post negative feedback on App store

[Pleximus]

When a merchant adds a review across the app store, as an owner, I get a notification after 2 days that someone has added a review. If the review is positive then there is no problem but if there is a negative review it is our responsibility to contact the merchant and resolve their problem as quickly as possible. But if we are informed only after 2 days, how can we provide speedy support. In such a case it doesn't matter if you publish on the app store after 2 days but the owner must get a notification immediately. After that they can validated that review to prevent potentially fake reviews.