I have Been disconnected form apple iTunes and App Store how do I get that back

Apple ID Has Been Disabled

1. If you forgot the passcode for your iPhone, iPad, or iPod touch, or your device is disabled
2. If your Apple ID is locked or disabled - Apple Support
3. If you see a message that says 'Your account has been disabled in the App Store and iTunes' - Apple …
4. Apple ID is Disabled - Apple Club
5. Apple ID- "This Apple ID has been disabled for security reasons" alert appears

Contact iTunes Support using this form or scroll to the bottom of this page and follow the screens until you find a chat and/or telephone option.  Pick any problem to select an option.  

I’d look at this article. I think it. Will help with your signing back in.

https://support.apple.com/en-us/HT201762

Best of luck