Thanks for your first post in the Roku Community!
We can certainly understand your concern that you want to manage your Fubo TV subscription.
For these inquiries, it may be more effective for you to get help from our billing team. Please contact them directly through our Account-Billing Support page. Choose the options for "Account, payments & subscriptions" and they are the best ones to help you out with that matter.
Please be advised that you can manage your Roku account and view your subscription by signing in to your Roku account here: http://my.roku.com
You may also refer to this Support page to learn about all the requirements for How to upgrade or change a subscription billed to your Roku account | Official Roku Support
If you have any other questions or concerns, please let us know.