Introducing Cox Gigablast

Hi, computers were not running fast enought for my use so i upgraded to PERFERRED INTERNET SERVICE, Then after 15 to 20 days noiticed this was to slow again. friend said check speed on speed check,org and the reading was download 2.39 upload 4.12. now am paying for 50mbps -- getting 2.39 so I call cox Tec. and we run a check and i was in the 2 .39 mbps. ask to shut down and plug in direct and reboot. got 60.2 mbps then we went wireless and got 59.8 / 6.46. now thats what i am paying for. checked later on when trying to show a short youTube and it cut out. so i checked checksteed.org and my speed was 2.68mbps again. then tonight I checked the cox speed under your web site and it showed 20.82/6.62 at 1;30 am. I feel I should get a refund for not getting what i paid for. Best Regards, G-man