Refund Equals CS

Nine times out of ten, when you tell a customer they cannot have a refund, the next words out of their mouth will be something like "Do you call this customer service?" or "This is the worst customer service I've ever experienced!" All because you didn't give them their refund or free product. This will often lead to Customer_Threat, or they may possibly hang up and call back to complain about you to someone else.