There can be many reasons why the standard index page is still appearing on your site.
When we create a hosting package, we place an index.html holding page into the public_html directory. See if the index.html page is still in there, and delete it before trying to re-upload your site.
Your live site files should be placed in the public_html directory. If you have put your files in another directory, your home page will not be the page you wanted it to be.
You may also be seeing a cached version of your site. Press the Ctrl and F5 keys together while in your browser to clear the cache and refresh the site.
If you are still having problems, please raise a Support Ticket with the Customer Services team.