When a customer is angry, the first goal is not to prove your point. It is to lower the heat. Let them explain the issue without cutting them off. Then repeat the problem in simple words so they know you heard them. Say sorry for the bad experience, even if the mistake is not fully yours.
The best way to handling difficult customers is to stay calm, accept the concern, give a clear fix, and follow up after the solution. Do not make empty promises. Give a real timeline. For example: “I understand why this upset you. I will check this now and update you by 3 PM.”
Customer complaint management can protect customer retention because people remember how you treated them after the problem.