Hub or router? There's an important difference.
http://www22.verizon.com/about/commu...1020%2C00.html
If you only have one IP address (static or dynamic is irrelevant) you NEED a router to handle translation of local network IPs (192.168.x.x) to your IP address in your internet provider's network. If you had multiple IP addresses in their network, then a hub would work fine, I think. So I'm guessing if you haven't changed anything at your end, and you are indeed using a hub, then they've changed their setup to limit you to one IP address. You can get around this by putting a single port router between the hub and their line, but I'd recommend getting a multiport router to replace the hub entirely. Linksys and Netgear are the brands I'd recommend.
As far as support, generally you have to pay extra to get networking support from an internet provider, but there is little they can or will do to tell if your line from them goes into a LAN via a router or into a single PC. If they don't "support" it, that doesn't mean you can't do it; it just means they won't fix it when it stops working.
Threaded Mode