Hello kleasa,
If you see a message that says "Your account has been disabled in the App Store and iTunes", you will need to contact Apple Support using this link, as it is a problem with the account information that can only be resolved on Apple's end.
See here: If a message says 'Your account has been disabled in the App Store and iTunes'
If your Apple ID has been disabled for security reasons, you will need to reset your password.
See here: If your Apple ID is locked or disabled
If you see a different message, please post a screenshot here as that would help.