You say you didn't have a Roku account before creating one to post here. But then you said you have a Roku TV, which requires a Roku account when you first set it up. So the TV is connected to someone's Roku account. You can see the email address used by that account by going to Settings/System/About.
Go to the Roku user account that uses that email address (https://my.roku.com). You can see any subscriptions on that account from that site, and you can also confirm any payment method attached to that account.
If there's no subscriptions listed, and there's no credit card linked to that account, you're being scammed. It's not actually Roku billing you, and there's nothing Roku can do to get your money refunded. The scammers use stolen CC information and submit charges that you never agreed to. They use a recognizable name, such as Roku, in a free text field to make you believe they are authorized charges and that you just pay them. If this is the case, you need to immediately contact your credit card company/bank and dispute the charges. If your CC info has been stolen, you should cancel that card and have them issue you a new one.
Dan
Roku Community Streaming Expert
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