Parallels does not host any websites or provide website hosting service. If you are having any issues with your website managed through one of the Parallels products, you should contact your service provider.
We sympathize. A downed website is no laughing matter and can cost you time and money. The company who hosts your website is who will help you.
The easiest way to find the company who hosts your website is to find out who you are paying for the service. Check your bank statements and your email. You can usually do simple searches using keywords such as "name server", "hosting", or "website account" to help you locate this information. You can also look for emails asking you to upgrade your service.
Who is Hosting This? is a very easy to use web service that allows discovering what company provides hosting for any website.
Information about hosting provider can be located using your website IP address or domain name:
http://www.whoishostingthis.com/