Hi, @mm18.
Welcome and thank you for joining us here in the Roku Community!
We would be more than happy to assist you in canceling your Peacock subscription.
To start, have you signed in with the email linked to your device? If not, follow these steps to check the email address on your streaming device: Home > Settings > System > About.
Furthermore, if your subscription is listed on a credit, debit, or another financial statement but does not appear in your Roku purchase history, it suggests that it may have been made directly through the channel provider rather than via Roku. If this is the situation, you will have to get in touch with Peacock Support directly for help with your subscription bill.
You may also visit this support article on how to view your Roku purchase history and charges to your account
Hope this helps!
Regards,
Reynan
Reynan L.
Roku Community Moderator