Bradley Gas Station Credit ONLY - NOT debit Englewood Colorado

Do NOT use your card as debit - ONLY credit when pumping gas at Bradley Gas Station.  When you do debit and don't go back inside after paying - expecting the money to go back to your card, it doesn't.  They say it's like cash so you have to go back inside to collect any left over money after filling up your car.  I saw inexpensive gas and filled up.  Put $25 on my debit card and only used $12.50.  I kept waiting durning the course of a week waiting for the money to go back to my card. I feel they should have a sign saying that right inside while paying, or at the pump to read while pumping.  When I went in today to ask about it, the guy just said, "well.... that's how we do it here."