We installed the new modem that they sent a while ago and the internet connection has been slower than ever since then. Wish I could go back to the old one. Half the time I can barely connect to the internet let alone stream a show or something.
Start here: troubleshooting guide. If you still need help, please post your equipment details (make/model of your modem/gateway/router) and a screenshot of your signal levels and your error/event log.