1. First of all, I apologize to the customer. Saying "I'm sorry" is the most basic courtesy.

2. Secondly, explain the reason for the error and admit responsibility. For example, "Due to an operating error by a worker who was tired from working overtime, the trademark was printed incorrectly. This is our negligence and we are deeply sorry for this."

3. Next, give solution. You can offer remasters, refunds, or other compensation to keep customers happy.

4. Finally, I would like to apologize again and thank the customer for their understanding and patience, and that you will take measures to ensure that this type of error will not happen again in the future.