No. All subscriptions are prepaid and non-refundable - it says that somewhere in the fine print. You can try going the route of https://support.roku.com/contactus , but you'll probably get the same answer.
Roku Community Streaming Expert
Help others find this answer and click "Accept as Solution." If you appreciate my answer, maybe give me a Kudo.
.. but after you cancel, you will still get the use of the channel for the balance of your prepaid subscription period.
Roku Community Streaming Expert I am not a Roku employee, only a user like you. Please, no support questions via private message -- post them publicly to the Community where others may benefit as well. If this post solves your problem please help others find this answer by clicking "Accept as Solution.".
Streaming Stick 4K+ 3821 | Streaming Stick+ 3810 | TCL Roku TV 43S245/C107X