Have you ever provided poor service to a customer, such that they were at least somewhat dissatisfied with your service?
If so, you are not alone. It happens to all of us in the service business at one time or another. What matters is how you handle this. If you are dealing with American sponsors / companies, it can mean the difference between keeping or losing a customer.
A quick story to make my point.
Last week I took my car into the dealer for several repairs. When I came to pick it up several hours later, it was obvious that one of the repairs (a wheel well liner) was not completed. I brought it to the attention of the Service Manager who immediately told me he would make it right, AND he offered to do it at no charge (this was a $230 repair). In addition, he offered to give an additional repair at no cost.