Extremely slow internet Issue?

[Josh]

So we recently brought a modem (D-Link 2880-AL Dual Band Modem) to supposedly fix the issue with our slow, slugish internet speed. It's a top of the range modem and we brought it thinking it would change the way we download, however, made no difference, actually you could say it made it worse then before. I've tried many things, checking for all things that take up a lot of downloads, changing System.ini coding, etc. I don't know, I really don't know what to do, does it have something to do with possibly the area we are in? Something I could've possibly done wrong during the set-up of this new modem?