PULL DOWN A WEBSITE URGENTLY. I HAVE NO ACCESS

My site must go offline immediately for security reasons. I no longer have working credentials to the server or control-panel, yet the files are still live, so the priority is to locate the host, gain rightful access, and delete every public-facing file until nothing resolves in a browser... (Budget: $10 - $30 USD, Jobs: cPanel, DNS, Linux, PHP, Server, Web Hosting, Web Security, Website Management, Website Optimization, WordPress)