Urgent assistance with NGNIX/Apache for Site not Working

We recently transferred from Web.com to Bluehost in preparation for switching to a Magento platform which we are not ready to launch. Our old site, now on Bluehost, keeps crashing due to an issue with NGNIX which Bluehost does not support. I am not a Webmaster and need a professional to take a look and fix the problem by either replacing NGNIX with Apache or getting NGNIX to work. We keep re-booting and it still doesn't work. We need this job completed ASAP. If this goes well, we will hire you to help us launch our new site and it will be a great opportunity to make some money.