This is EXACTLY what happened to me! I have Direct TV and called TWC yesterday to kick the tires on pricing, thinking of switching service. Today, I got the call just as described below. It was loud as hell in the background. Hilarious. Now I'm not sure if I'm going to make the switch (which I was going to do). WEIRD!
This number called saying they want to sell me cable. I was getting time warner installed in a few days. I asked who they are with and crazy enough they said time warner. I told them if they were with time warner they would know im already waiting on service. They hung up and are calling now 3days later.