Comcast problem or C7500-100NAS problem?

Model: Netgear C7500-100NAS

Firmware version V1.01.32

Hello all,
I am having an issue with bad Internet connection from Comcast and they suggested that it was my brand new C7500's fault which doesnt make any sense. I specifically bought this modem/router because it was on Comcasts compatible devices list. I actually was having the same issue using a CM600 Netgear modem (also on their compatibility list) until yesterday when I bought the C7500. I was trying to eliminate my networking equipment as the issue however, I spoke with Comcast and they suggested that it was the fault of my router. Im just trying to do my due diligence so I was hoping that you would help me eliminate the modem/router once and for all.

I am paying for 200 Mbps, well within the realm of possibility with my new device, however when I take Comcasts speed test I am only getting 32.17 Mbps down/12.10 Mbps Up. Just to be sure I went to speedtest.net (14.07 down/11.91 up) and Google's speed test (3.37 down/11.8 up). These were the same result that I got with my CM600 modem as well. Im just hoping that you can help me narrow down my search.

Thank you in advance!

I'm not sure if this will be helpful (if it's not let my know what would be) but here is my cable connection information: