Horrible speeds

I have noticed a lot of issues while playing games online, but have just recently did speed test to test things out. I should be getting 50Mb down, I'm getting no more than 9, currently getting 2.5 and lastnight I was get 600K. I have been on hold with support for 30+ minutes and still have not heard a human talk. I have reset my modem numerous times, I have even try the speedtest on Cox's website, never works just times out. 

I have now been on hold so long the music has stopped.

My call, just started ringing and looks like I was replaced in the line all over. If I have to go to the Cox building to get help I will be taking my modem and canceling my service.

This is through a wired connection, and wireless connections are the same. My wifi is secured and I have verified no one is tapped into it.

www.speedtest.net/my-result/3953114577