Urgent WordPress Malware Cleanup

We need an experienced freelancer to urgently clean up malware from our WordPress site and recover it from a 500 error. The site is compromised and requires immediate attention to ensure security and functionality. The ideal candidate will have a strong background in WordPress and malware removal, and be able to work efficiently under pressure. More details: My WordPress website appears to have been compromised and I need an experienced WordPress security expert. Current issues: -Website returns HTTP 500 / Critical Error. -Unknown administrator account was created (george.moore). -Russian casino spam posts were published. -Suspicious plugins appeared. -Hosting disk became full because of a 23GB error log (already removed). -Plugins have been disabled but the site still does not load. I need someone to: -Restore the website. -Remove malware and backdoors. -Remove unauthorized users. -Clean the database. -Identify how the compromise occurred. -Reinstall clean WordPress core if necessary. -Secure the website to prevent future attacks. -Provide a summary of what was done. Please only apply if you have experience with WordPress malware cleanup and security.