WordPress Site Repair with Backup Setup

I need a one-time fix for my WordPress site (savvywinesoirees.com) hosted on Bluehost. The issues: – Site down with a 500 Internal Server Error. – Downloads PHP files instead of displaying pages. – Divi theme/builder malfunctioning… (Budget: $30 – $250 AUD, Jobs: Content Management System (CMS), HTML, MySQL, PHP, Web Development, Web Hosting, Web Security, WordPress)