Thanks for your first post in the Roku Community!
We understand that you are inquiring about a charge.
Have you verified that you currently do not have any active subscriptions by logging into your Roku account online at my.roku.com and clicking Manage your subscriptions?
In addition, are you being prompted with an error message when trying to send a Support request? Have you tried logging in from another device or browser so you're able to send a Support request?
Please keep us posted.