Ethernet ports around apartment not working

Hi,

I recently moved into an apartment at the beginning of the month. An Xfinity technician came out to set up the internet, and it has been working perfectly fine since then.

I noticed there are a large number of Ethernet ports throughout the unit. In my den, I have my desktop/work area set up. I’ve tried connecting multiple Ethernet cables from the wall ports to my computer, but I’m still not receiving an internet connection.

Is this something I need to contact a technician about to come out and take another look?

I find it hard to believe the apartment has so many ports if none of them are able to provide internet. I’ve attached a few photos of the current setup. Please advise.