If you think you have been scammed, you should change your password on your Roku accounts, check your credit cards for charges you don't recognize and report them to your credit card if you have unknown charges.
You can check you Roku subscriptions by logging into your account and see what subscriptions you have through Roku.
If you have other subscriptions, such as Max or others, that you pay for through those apps, then you should check those as well individually.
