Failing to follow up with the customer, ignoring or dismissing the complaint, or acting as if it isn't worthy of addressing. Making excuses, deflecting, or laying the blame back on the customer, management, or another department.

When a customer complains, the biggest mistake is to get defensive or start an argument. Even if the customer is factually incorrect, telling them they are "wrong" or "stupid" will immediately escalate the situation and ruin any chance of a peaceful resolution. You should also avoid making excuses—the customer generally doesn't care about your supplier issues or staffing shortages; they only care about their problem. Never dismiss the complaint as "no big deal," as this invalidates the customer's feelings and makes them feel ignored. Additionally, avoid passing the buck by saying "it's not my job" or "you need to call someone else." Instead, take personal ownership of the interaction. Finally, never lie to a customer; in the age of 2026 social media and instant reviews, a small fib to end a conversation can quickly spiral into a public relations disaster that damages your company's long-term reputation.