Urgent Google website flaged as dangerous need URGENT CLEANUP

My site is currently blocked by Google for “Phishing content” and visitors are met with a red-screen warning. I need that warning lifted within the next 24 hours. The site already passes a routine antivirus scan, yet something is still triggering Google’s Safe Browsing list... (Budget: $12 - $30 SGD, Jobs: Content Management System (CMS), Data Protection, Incident Response, Internet Security, Penetration Testing, PHP, Risk Management, Web Security)