Ways to display sensitivity and courtesy when handling complaints?

To display sensitivity and courtesy when handling complaints, actively listen to the complainant without interrupting, showing empathy for their feelings. Acknowledge their concerns by validating their experience and expressing regret for any inconvenience caused. Maintain a calm and respectful tone throughout the conversation, and offer clear, constructive solutions or alternatives to address their issues. Finally, follow up to ensure their satisfaction, reinforcing that their feedback is valued.