@Bella Dea,
Welllll...I went to a McDonald's recently. Got a simple $1 large cup of coffee and the receipt said to review the restaurant and I could get a 2 for one deal. So, while doing my laundry and sipping my coffee, I did that.
Went back and ordered a Sausage egg muffin. I showed the receipt. cashier rang it up. 4 min later, got 1 and then said "I ordered 2" well, the manager looks at the order yells in the back "Pay attention people, mistake made! Check your order screen" Wow, she was firm, but didn't curse them.
"I am so sorry for this sir, please accept my apologies" she said. How could I not forgive them? She did what I would wish every manager would do. Didn't curse, encouraged the workers to pay attention but didn't berate them.