Have you ever deal with an unreasonable customer? How did you handle it, and how would you handle it today?
Here you have to share your experience where you had a deal with an unreasonable customer successfully or not doesn’t matter.
These questions are asked to judge your emphasizing abilities and your calmness.
To handle this situation today, I would show some empathy towards the customer and deal with him in a very polite and professional way by maintaining the company’s guidelines.
Note: You should know the answer of this question if you are an experienced person since it is commonly asked in the customer service interview questions.