I'm not sure about companies with that much bandwidth , but there are some good companies such as BurstNET, HostGator, VPSLatch and others. You may want to check out the VPS Server offers and you can find a great deal in those forums.
No, we do not utilize live chat for support.
We have too many departments and employees in our operations, and we need to pass things around to appropriate individuals to handle, which cannot be done thru live chat.
Can't trust the companies which offer "cheap but good" hosting.In another way try the lower plans of quality hosts.
I can suggest you to increase the budget a bit around $35 and chose quality web-hosts.If you don't have that much budget,just wait for a while until you get enough budget.Beware of such "cheap but good" hosts who oversells their hosting.
Regarding Hostgator...they are one of the best hosts.But they don't offer managed hosting for $15.Their semi-managed hosting starts at $19 and fully managed starts at $39.5 .So try to increase your budget