pmorin wrote:
Why yes we do. Here’s a quote from him earlier in this subject line.
“Thanks. I saw that page, so I guess I'll have to go to my Mac and see if I can cancel from there. I'm disappointed that I can't watch anything my TV. After all, it is called "Apple TV." Imagine watching a movie on an Apple watch or iPhone. I want my 55" screen!”
So we know positively that he has a Mac. And on that Mac it’s settings-Apple ID-manage subscriptions.
Actually, on the Mac you have to go to the App Store, then click on your name at the bottom of the sidebar and then click on View information at the top of the account page and then scroll down to manage. The process that you suggested will only work on an iPhone, iPad or iPod. I'm not sure if the OP has one of those devices.
Also, he may have signed up for Disney Plus on the Disney web site. If so, it may be necessary for him to cancel the subscription by going to the Disney Plus web site. In any case, as has been suggested several times, it may be easier to contact Apple Support at 800 APL CARE for assistance.