What is the best way to speak to someone regarding establishing internet service for a new construction?

Good luck. I've been going back and forth with support on a new construction and the date has magically slipped by a month. Cox blamed another group for being unable to fill out the infrastructure while the neighborhood developer says the infrastructure is in place so I'm stuck in a loop and can't get anywhere. Sales, support, serviceability all say they can't do anything and to keep calling back. Such a frustrating experience and I can't find out who is in charge of allowing service to be run when it shows up in their system.