Hey @ginna,
Welcome to the Roku Community!
We're sorry to hear that you've been charged for a free trial. Offers and promotions are at the discretion of our channel partner, and some may have rules and restrictions, like if you ever had a free trial with the channel in the past. Reach out to our billing team directly, they can offer assistance. You can contact them at Roku Support.
If you need further assistance, keep us posted.
All the best,
Kash
Takashi O.
Roku Community Moderator