Stamping Feet Over A Stamp

(I work at a chain coffee shop. We have a deal where you pay for ten coffees beforehand, to get them at a lower price. Each time a customer orders a coffee, we mark their card with a stamp.)

Me: “Hi, what can get for you today?”

Customer: “A cappuccino to-go.”

(She hands me her card, I stamp it, and hand it back to her.)

Customer: “Y-you can’t be serious.”

Me: “Excuse me?”

Customer: “This can’t be true!”

Me: “What seems to be the problem?”

Customer: “This stamp! It’s looks terrible!”

Me: “I’m sorry, ma’am, I guess it could use some new ink. They do tend to vary in size, from what I’ve seen before.”

Customer: “This is so unprofessional! I cannot believe you would actually do this to me! I want to see your manager!”

Me: “I’m afraid my manager is not in today, but feel free to write her an email about your complaint, or come in tomorrow.”

Customer: “I WILL! Someone needs to put a stop to this outrage!”

Me: “I’m very sorry, ma’am. Would you still like your coffee?”

Customer: “No! I am never buying coffee here again! I am going to have you fired for this! Now take off my stamp!”