What number do you call GS Corporate? Do you mean when you do the Tellgamestop.com and the DM reaches out to you?
GS corporate = (817) 424-2000. Ask for "executive customer service" and you'll get to the Tier 2 reps that are over the Tier 1 main CS reps on the main GS customer care number, plus they deal with store issues and can get to the people higher up if needed.
Survey would be on TellGamestop.com and click on the "don't have a receipt". Fill in the info and make sure to hit them with lots of 1s and No's on the survey. It's easy enough to figure out.