Welcome, @Magatha.
Thanks for reaching out here in the Roku Community!
We understand that you wanted to remove your payment information from the email to which you don't have access. We're happy to help you out.
The only way to remove a payment method is by logging in to your Roku account, which you don't have access to. To expedite resolving your issue, we highly suggest contacting our Accounts and billing support team for further assistance. They can help you straighten this out because they are our experts on issues like this. You may navigate to Accounts, Payments, and Subscriptions to reach them via Phone, Email, and Chat.
For future reference, you may visit this support FAQ on How to remove the payment method from your Roku account.
We hope everything will be sorted out for you soon.
Sincerely,
Emman
Emmanuel-D.
Roku Community Moderator