Gigabit and lag from hell

I have gigablast and am suffering from horrible lag, our whole neighborhood is. Call Cox today, and their system doesn't even show the 2 outages we have had in the last 2 days. Wtf. They don't seem to interested in fixing the problem, and just want to keep charging us to send a tech out. I do have the panoramic modem, which is a piece of ** and Im about to get rid of. I understand all this increase in traffic, but I pay a lot for speed and have never seen more than 350 if I'm lucky. Anyone have any suggestions? Tired of getting the run around from support