From Apple’s official content provider contact support page:

To find contact information, open the app on your Apple TV. On Apple TV (4th generation), you can also open the app in the App Store. You can see the provider’s name at the top and their website at the bottom of the screen.

If you can’t find contact information in the app, check the list below.

By my count, the list shows 85 different content providers. I had no idea there were so many. If you’ve got an Apple TV, might be worth scanning the list, just to make sure you know all the available options.

[Via iDownloadBlog]