You can check your subscriptions and purchases at https://my.roku.com . If none are shown then it's not Roku that's charging you. Make sure you use the email address that's displayed under Settings->System->About and if you have multiple Roku devices check the email address on all of them.
Roku Community Streaming Expert
Help others find this answer and click "Accept as Solution."
If you appreciate my answer, maybe give me a Kudo.
I am not a Roku employee.
