fatal error received during plugin upgrade

Help! I was upgrading plugins and new WordPress version and my site went down and I receive this error:

Warning: require_once(/home/jean/public_html/wp-content/plugins/contact-form-7/includes/formatting.php) [function.require-once]: failed to open stream: No such file or directory in /home/jean/public_html/wp-content/plugins/contact-form-7/settings.php on line 80

Fatal error: require_once() [function.require]: Failed opening required ‘/home/jean/public_html/wp-content/plugins/contact-form-7/includes/formatting.php’ (include_path=’.:/usr/lib/php:/usr/local/lib/php’) in /home/jean/public_html/wp-content/plugins/contact-form-7/settings.php on line 80

What can I do to fix this?