Consistently slow speeds

I've been experiencing significantly slow speeds even after multiple restarts of the modem. I have a wired connection to the modem on my PC and am barely getting above 100 down. Wireless devices are barely over 40. I'm paying for 1GB speeds and can barely get a Netflix show to load without buffering in the next room. This is extremely frustrating when the app and customer phone line just say "nothing's wrong, goodbye" and there's no way to talk to an actual human.