If you have re-uploaded the right data, you might try refreshing your browser or clearing out the browser history/cache.  Good luck!

Go into cPanel > File Manager and navigate to the proper directory (public_html/ ?). "Show" your index file contents and see if it's the latest and greatest. If it's not, you messed up something in your FP configuration (did the file get uploaded to some other place on your site?). If it's the correct file, and you're not doing any redirection that you've forgotten about (in .htaccess), then you're failing to clear your browser cache. Usually, pressing Ctrl-F5 should force a complete reload of the page.

While you're in File Manager, see if you ended up with multiple index files in one directory. If you did, don't forget that the server looks first for index.html, then for index.htm, and finally for index.php. So if your old index file was index.html, and you just put in a new index.htm, the server will still be running index.html (since it comes first in the search order).