Without using any automatic hosting feature (and then waiting) you can directly edit .htaccess file and quickly redirect all your non-www URLs to www URLs.
Visit your website’s file manager from cPanel, open .htaccess file and add the following given code changing example.com to your domain name:
RewriteEngine on
RewriteCond %{HTTP_HOST} ^example\.com$ [NC]
RewriteRule ^(.*)$ http://www.example.com/$1 [R=301,L]
This will 301 redirect your website’s non-www URLs to www URLs.