Cable box to Yamaha Receiver w/o reboot

Following:
1. Just over $20k in a home theater system
2. A total of just over 110 hours attempting to see comcast cable on the system.
3. 30 hours to attempt a "handshake"
4. Repeated calls to "service reps," speaking with such strong accents I can't understand them
5. Repeatedly being hung up on
6. Four trips for a new box
I Still cannot "pair", "sync", or "handshake" cable box with my Yamaha reciever and hence my awesome system sits idle. In addition my box does not have a port for cable to sound on receiver, and its durn near impossible to tell if the new box is on/off.

My solution: Take the millions you spend running ads touting your greatness and invest in Quality designers, customer focus groups, and training. Make certain there are leaders who not only have the responsibility but also the authority to make serious change.
I've read blogs across the country speaking to this inane and unnecessary problem and still Comcast does nothing. I believe I would rather slice my wrists and do pushups in saltwater than speak to one more person (tech) who is Comcast system challenged.

If any person knows how to pair Yamaha RXA840 with box please help. I've tried all the suggestions countless times. Is there something....ANYTHING I am missing?