I was supposed to get a 7 day trial and it charged my credit card without doing my 7 days
Did you ever have a free trial in the past? You can only get it once.
Thanks for the inquiry.
In addition to what @renojim mentioned, have you made sure that you are subscribed to the 7 day trial rather than subscribing to the channel?
You can verify your Roku channel subscriptions by logging into your Roku account online at my.roku.com and clicking Manage your Subscriptions.
For more information about how to manage your Roku subscriptions, visit our Support page here: How do I manage or cancel a Roku® Pay subscription?