Restore Corporate Site Hosting

My corporate website used to load perfectly, but at the moment it simply will not come up. All files and configurations are still in place on my GoDaddy hosting account; something has clearly changed and I need an experienced eye to identify the cause and bring the site back online... (Budget: ₹1500 - ₹12500 INR, Jobs: DNS, HTML, PHP, SSL, Web Development, Web Hosting, Website Optimization, WordPress)