Your first line of support is whomever you pay for your the InterWorx license. InterWorx may be bundled with a product from your hosting company. In this case, you should contact them for help.
If you bought it directly from InterWorx you may open a support ticket.
If it came preinstalled on your server, you will need to contact your datacenter or service provider for support. If they are unable to resolve the issue, then they will contact us for additional assistance.