You can verify that a refund was processed successfully on the "My Products" page of your RocketHub account.
Select "Account" from the navigation bar at the top of the page
Click the "Products" tile
Use the "Filter:" dropdown menu to select "Refunded"
Once you see the product on this list, that is confirmation the refund has been processed.
Please note that once a product is refunded, the deal partner will remove your user account from their platform.