iTunes disabled

As per this article https://support.apple.com/hi-in/guide/iphone/iphea1c2fe48/13.0/ios/13.0

You can return settings to their defaults without erasing your content.

If you want to save your settings, back up iPhone before returning them to their defaults. For example, if you’re trying to solve a problem but returning settings to their defaults doesn’t help, you might want to restore your previous settings from a backup.

1. Go to Settings  > General > Reset.
2. Choose an option .

• Reset All Settings: All settings—including network settings, the keyboard dictionary, the Home screen layout, location settings, privacy settings, and Apple Pay cards—are removed or reset to their defaults. No data or media are deleted.

Read the article https://support.apple.com/en-in/HT201272

If you see a message that says 'Your account has been disabled in the App Store and iTunes' - Apple Support

Wrong advice for this issue.....

If you see a message that says 'Your account has been disabled in the App Store and iTunes' - Apple Support