Help & troubleshooting for channels on your Roku device, including adding/removing channels, logging in to, authenticating, or activating a channel, channel-specific playback issues, assistance contacting channel publishers to report issues, and adjusting channel-specific settings.
Some channels/apps are only available within certain countries. I know nothing about Deezer, but you would need to ask them if they are supported in your location. Streaming providers are often restricted by their licensing agreements where they can provide their service. Chances are good that Deezer might only be available in North America, but only Deezer can answer that for certain. And it's also possible that while they are permitted to stream in your country, they might not allow it on Roku devices. That has been observed with other channels in different countries.
Dan Ultra (4640), Ultra (4670), Ultra (4800), Premiere (3920), Insignia 720p Roku TV, Sharp 4K Roku TV, Nvidia Shield, Windows 10 Pro x64 running Serviio and Plex on a wired Gigabit network.