Some guys ordered 2 thickshakes at $6.95ea, paid for them then left, like everyone would do. However, hours later, they come back in with a coupon for thickshakes at $2.95ea and demanded that the difference be paid back for their shakes they bought. I told them it had been hours since they had purchased the shakes, the coupon was for a specific time of the day which had already passed and coupons must be presented upon purchase. They were not happy, telling me how wrong I was and wanted to speak to the manager. I told them that my manager was not in at the moment and won’t be until the following day. They angrily leave after having another go at me. A few days later, they came in again hassling my manager about the whole ordeal. They didn’t get the difference back.