Forum Moderators: not2easy
Secondly, you have confused copyright with licenced use, because no serious web development firm will sign over intellectual property, unless this has been negotiated (and properly compensated for) beforehand.
The only copyright you own is that of your own original material which you supplied to the company for inclusion in the site.
They own copyright to original creations included in your site, and you, by paying them a fee, are licenced to use it, usually exclusively.