I'm sure I don't understand what you're on about regarding expired coupons. Nobody honors expired coupons or expects them to be honored. Nobody expects or gets more than the coupon specifies. I thought the subject was poor customer service, not misunderstandings about coupons. Where do ridiculous imaginary requests about Chili recipes, etc., come into the equation? What ARE you talking about?
Furthermore, just because the customers WANT the cheapest price does not mean they want or should get it at the expense of customer service.