consistently poor connection speeds - XFinity

So, I pay extra for supposedly a higher speed connection. And this is what I get. DOWNLOAD
11.34Mb/s UPLOAD 22.55Mb/s. This is not a "higher" speed. It's not even a "high" speed. Unless of course I was on dial up, then I guess you could say it was . I'm not. I'm on Comcast's Preferred Plus Extreme 150 Internet. And this is what I get. And yes, I've restarted my modem, my PC, removed extension from the Chrome browser, cleared my cache and ensured my pc is at least 5 ft from the modem, and yes my modem is in a "recommended" location. What's up with this???? Extremely frustrating.