@Julyblumoon
The use of a Roku is free and never any charges for having or using a Roku device. You only pay for any subscriptions you may have subscribed to.
What are your Roku model numbers, your router model number, and who is your ISP (internet service provider)? What error messages are you seeing on screen (009, 14.30, etc).
Roku Community Streaming Expert
Just another Roku user... I am not a Roku employee.
Insignia RokuTV, Ultra 4660, Premiere+ 3921, Express 4k+ 3941, Streambar 9102