I was at CVS and the self checkout machine said it offered cash back, and charged me for purchase 2$ dollar licorice plus 20 dollars for the cash back was charged to my card. After the employee said that one doesnt have cash back and I noticed it had no slot for money even after. But it still charged me for the cash back!

Employee said money will come back but I don't see it. Probably capping right. ? or what just happened lol