When handling a difficult customer interaction, I like to handle each one individually because some people are open to listening and some people are not. I've had people who are just screaming at me. I've had people who are willing to listen and go about. Either way, I handle it in a mature manner. I speak with them at an okay volume. I don't believe it's ever okay to raise your voice at them or create more friction than there should be. I like to make sure that the customer leaves helped with value and information or leaves with a product that they came in to buy. And about the first one, I didn't know that it was going to be interfering.