Perhaps your cashier had run out of coupons. Or Penney's might have changed its policy and told cashiers not to give them out any more. Even though you didn't have your charge card, Penney's looked it up for you and let you make the purchase. I imagine you had to verify who you were. If you want to take back the products you purchased, that's fine. But I don't understand why you are angry with them. Perhaps you could call Penney's customer service and ask about their coupon policy. If they are in the wrong, they will probably give you credit for the coupon.