Defender deleted wordfence-waf.php, now can't get site back online

Hi guys,
Having a real serious issue here that I can't figure out. The site was recently found to be hosting malicious code, so I used Defender to clean the site out (worked well, I just wish there was an easier way to delete over 250 files)

However Defender also recommended deleting wordfence-waf.php. As soon as that happened I was getting the following error:

Warning: Unknown: failed to open stream: No such file or directory in Unknown on line 0

Fatal error: Unknown: Failed opening required '/home/wwwmarra/public_html/wordfence-waf.php' (include_path='.:/usr/lib/php:/usr/local/lib/php') in Unknown on line 0

This is still happening on the live site. I tried the editing .htacces and php.ini as has been recommended in many other tickets also mentioning this issue but this has had zero effect.
I've tried a number of things, even going as far as wiping the directory clean with the error still showing.

Replacing wordfence-waf.php has also had no effect.

I'm out of ideas now so I hope someone can help here!