start by saying what are your issue and your website adress so we can see what`s going on..

Have you tried to contact the ssl provider?

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Maybe this will help you find your answer: https://support.comodo.com/index.php...e-installation

I think its good to contact the service provider to do this task.

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Hi

I think the below link might provide some insight on converting http to https.

https://www.elevated.com/guide-conve...te-http-https/

Thanks

You can use CloudFlare Free account and get free SSL. you can also force redirection from there.
Option #2: Let's Encrypt is a free, automated, and open certificate authority brought to you by the non-profit Internet Security Research Group. Then you can using .htaccess rules to force HTTPS redirection instead of HTTP

https://letsencrypt.org/
How-to: How to Force HTTPS Using the .htaccess | InMotion Hosting

Hi, I am happy to read your description. You may contact with your hosting provder. They can make a easy solution for you. May be you have to charged $50/year for SSL. If you are not interested to spend this amount then I have provide you alternative way

You can contact your hosting provider that will me bay provided free SSL certificate