To cancel a extension rental, log into your Shopware Account and go to the "Shops" section.
There you can select your domain and find your rental licenses in the lower area. Select the extension for which you want to cancel the rental and click on cancel rent. The rent will then be cancelled at the next possible time.
Note: If you have any questions or problems regarding bookings/licenses/subscriptions, please contact Shopware directly, as we as the manufacturer cannot influence this. > Shopware Support
You can find more information in the Shopware documentation: