I made a mistake. When I logged in joomla site administrator settings and set force SSL on entire site. Only then I realized my mistake. I tried to connect with FTP but either I do not know correct way to do it or it was not enabled in settings.
Is there any way to connect and change settings to restore site?
Update: I was able to change force_ssl to 0. But site is still not functional and wants to go to https. Also I'm still unable to access administrator site.
If I recall correctly I also enabled force HTTPS.
How can I change this setting?