I have a friend on the Google ecosystem and she was laughing yesterday about trying to get it to play our local public radio station and eventually she shouted

"Hey Google You Suck!" and it apologized and asked how it could do better. She said to play Wyoming Public Radio so it started Pandora. 

I can't get Google Assistant to start playing Radio paradise.
I am trying commands like:
"Play Main Mix on Radio Paradise"
"Play something on Radio Paradise"
"Play Main Mix using Radio Paradise"
Usually the response is something like "I dont' understand" or it starts playing some playlist named something with paradise in it, using Spotify.
I have this problem with Google Assistant on several devices:

• My Android phone wich has the Radio paradise app installed.
• My Sonos with Google Assistant enabled and Radio Paradise configured as a Service.
• My Renault Megane car which has Google Assistant and where the Radio Paradise app is installed.