My website is still HTTP even after I installed certificate

Hi

My website is still HTTP even after I installed the SSL certificate.
I am using StartSSL for issuing the SSL certificate.

How can I solve this problem?

My domain is below;
Domain: nsiestore.epizy.com
Username: epiz_20449106

It took time to reflect changes.
The web site is HTTPS now.
Admin, you do not have to reply.

Thank you.