How to disable SSL that doesn't exist

[patipat]

I can't find nowhere solution for my problem. I will be grateful for help.

Problem:

I forced SSL for my Joomla site though I had no SSL certificate bought. It worked. Of course before I could see my site under https://mysite.xyz, I saw info in my browser that there is some danger because certificate is wrong and I had to make an exception in the browser's rules to see webpage. Still I was satisfied because I felt safe when I logged to the site's back-end at https://mysite.xyz/administrator.
Yesterday I wanted to disable ssl from my front-end so no warning info would show up to my visitors but...I can't do it. Instead of http://mysite.xyz/ I always see https://mysite.xyz/.

I was trying to change it through: changing System-Global Configuration-Server tab-Force HTTPS parameters (I see in configuration.php that 'public $force_ssl' is changing correctly); changing name of .htaccess to htaccess.bak but nothing works...

I don't want people to be afraid of my site just because there is that terrible info about wrong certificate... I am using Joomla 3.6.5.
If anybody knows how to disable SSL, help me, please.

[cybersalt]

If you have turned off force ssl in the configuration and your .htaccess file has no coding to rewrite urls to secure ones, I wonder if you are running into a caching problem with your browser.

What is the address of your site?

Also, are you using an other extensions that rewrite or cache your urls?

[patipat]

My address: http://www.gdziezmianaopon.pl

I have no special extensions to rewrite/cache urls.
There is admin tools but when I disabled it nothing changed.
I was entering my site with different browsers on different computers.
My site is set in shared hoster servers.

Now I have disabled all extensions I had installed on my own and left enabled just akeeba tools and akeeba backup. Additionally I left now 'Force HTTPS' option set on 'Administrator Only' /but when it was set on 'None' it didn't work either/.

Site still redirects to https... This is crazy.

[cybersalt]

Do you maybe have the HTTPS URL in the live URL in the configuration.php file?