Ошибочно изменил http на https

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I made the mistake of changing my site’s URL in the General Settings HTTP to HTTPS. after unable to go back admin and site... 
 
please help me...

Что я уже пробовал:

i have tried following options. 
1:wp_option from database. 
2: define('WP_HOME', 'http://sitename.com');
define('WP_SITEURL', 'http://sitename.com');
but still i can't access my website.

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