Update:

I plugged in my cable certification tool. Found out all jacks are terminated oddly. When I removed a wall plate, a number of plastic bags fell onto the floor. Oh look it's the keystone's bag, they used the wall as a trash can, wonderful. Went around to each wall plate and took out the trash...

Found a few lines that are dead somewhere in the ceiling. Customer calls CG, CG arrives. CG informs customer that he's not sure why his installers wired the building as is and that it needs to be re cabled. He informed the customer it would only be a few thousand. Customer turns RED.
CG explains he does not do free labor. Customer tells CG to leave.

Very fun night.