Do you have a Disney+ subscription? How are you subscribed? Are you subscribed through Roku Pay or through the channel provider directly? From the sounds of it, it looks like you have two subcriptions.
For account & billing concerns, it may be more effective to get help from our Billing team. You can contact them here: support.roku.com/contactus then choose 'Questions about my account or billing' on the drop-down menu. They are the best ones to help you out with that matter.