I’d love to know how to get back into wp-admin and get my site back online.

I contacted GoDaddy tech support again today and the PHP is supposedly updating.. WordPress has been complaining about the older version of PHP it had a while back, as of 5 months ago, a GoDaddy rep told me I had to wait for the devs to switch me over at their convenience… Sadly, now I can’t access wordress admin at all, I can only see this error message when I go to my URL:

Warning:
require(/home/content/60/11745860/html/wp-includes/class-wp-post.php):
failed to open stream: No such file or directory in
/home/content/60/11745860/html/wp-settings.php on line 199

Fatal error: require(): Failed opening required
‘/home/content/60/11745860/html/wp-includes/class-wp-post.php’
(include_path=’.:/usr/local/php5_6/lib/php’) in
/home/content/60/11745860/html/wp-settings.php on line 199

Can I find this path / php file with the basic GoDaddy hosting File Manager? Should I wait for it to fix itself? Perhaps I should give up and build a new site? Any advise would be much appreciated. Thanks! – Teale Rose