Screen Mirroring Android not working

I've seen a lot of posts here regarding screen mirroring not working for android users. It's not working for me either. I have done every single recommended intervention. I have a Samsung galaxy. I've checked every recommendation for my phone, the app, and the ONN Roku TV. So @ Roku Help, do not respond with the same request for device information that everyone else gets. WHAT IS THE ETA AND PLAN FOR RETURNED MIRRORING SERVICES?? YOU ARE FRAUDULENTLY ADVERTISING! A CLASS ACTION L A W S U I T IS COMING! WAKE UP!