What can i do if i get this message: " Your account has been disabled in the App Store and iTunes"?

As explained in the support document you posted from(If your Apple ID is locked or disabled):

If your account has been disabled in the App Store and iTunes Store

If you see a message that says your account has been disabled in the App Store and iTunes Store, contact Apple Support for help. 

Click the blue "contact Apple Support" link to get help with that particular issue. Only Apple support directly can help you fix that issue.

Is there no Chat option given?

Thanks a lot

What happens if I live in Costa Rica and I can't call support? What can I do?

I saw the problem, in my support page, my location was in Costa Rica, I changed to United States and now I have both options, chats and calls.