OK, I finally have an update. I called the number you provided (thanks again) but could never get the call to go through. I'd get about 30 seconds of silence, followed by a recorded message stating "We're sorry, your call did not go through." I tried from a cell, and a landline, no luck. I have a feeling it may be a number that allows outgoing calls but no incoming.
With that said, my DirecTV cancellation was getting close, it was scheduled for 9/1. I had to make a decision whether to go through with it and cut the cord or call them back to negotiate. I figured there was no harm in giving it a shot so I called them back and asked for a customer loyalty rep.
Just to give a point of reference, my monthly bill is usually $143 and that was jumping to $190 with the addition of NFL Sunday Ticket. I informed the rep that I wanted my monthly bill lowered to approx $115 (with no loss of any of my current programming) and NFL Sunday Ticket for free for the entire season. She said that since I was a long standing customer of 13 years she would be able to make that happen. A few hours later I went online and checked my account and was happy to see that my new monthly bill was $113, BUT as I looked into things further it appeared that HBO had been removed from my programming. I checked when I got home from work and sure enough HBO was gone. I called them back and explained the entire issue and they so no problem, we'll put it back. A short time later HBO worked again, but once again there was an issue. I checked online and my bill was now $123. It's been a frustrating process but I'll probably just stick with them, at least until the season is over. The long and the short of it is I will save $20 a month and get free NFL Sunday Ticket.