After you successfully paid for a hosting product, an email named Billing Setup Welcome will be sent to you within 10 minutes. You can get the credentials of Client Area from that email.
Please get the credentials and log into Client Area by visiting https://billing.host4asp.net/clientarea.php. After a successful login, the Client Area should look like this:
Click Services->View Available Addons, all available add-ons associated with your hosting will be listed, locate SSL products and select the targeted SSL you want and click Order Now.
If you couldn’t find the SSL products or the specific SSL you want, or you get any problem, please contact us via live chat, we will assist you to resolve it.