Hello seehearinc,
To help us better assist you, can you let us know more about what happens when you try to sign out? For example, do you receive any specific errors? If so, what does the exact error say?
The above details will help us plan how to proceed.
Please check out the information outlined in the following link to ensure the correct process is being used to sign out of your TV provider, so we can make sure they're aren't any issues there: Sign in with your TV provider on your iPhone, iPad, or iPod touch
Change or sign out of your TV provider
If you change TV providers, you can remove your current TV provider account information or set up a different one:
1. On your iPhone, iPad, or iPod touch, open the Settings app.
2. Tap TV Provider.
3. Tap Remove TV Provider or Sign Out.
4. In the pop-up that appears, tap again to confirm.
5. Choose your new TV provider from the list, then follow the steps to sign in.
Thanks!