Every app in GitHub Marketplace includes a link to contact the app's support team.
To open GitHub Marketplace, in the top-left corner of GitHub.com, select , then click Marketplace.
Note: This step refers to the new global navigation, which is currently in public beta and subject to change. For more information on the new global navigation and reverting to the old global navigation, see the GitHub Changelog.
Browse to your app's page.
In the left sidebar, under "Developer tools," click Support.
On the app's support page, follow the instructions on the app's page to contact the app's support team.