There is no charge for TRC. There are services that are available within TRC that require a subscription, and if you have any of those you can find them listed on your Roku user account site (https://my.roku.com).
If you check your account and there's no subscriptions listed, then Roku is not billing you, regardless of what your CC statement says. Scammers get people's CC information (stolen, obviously) and submit charges they think people will think are genuine and just pay it. They can make the charge say anything they want, so they enter Roku hoping the person actually has a Roku device.
If there are no subscriptions, first contest the charges with your CC company, and then ask them to cancel your card and issue a new one. If one scammer has your CC information, then there's a good chance others do as well.
If there are subscriptions listed on your Roku account, and you no longer want them, you can cancel them right there in the user portal. You won't get a refund, as the subscription will continue for the time period already paid for. But it won't be renewed for the next period.
Dan
Roku Community Streaming Expert
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