أنشئ حسابًا أو سجّل الدخول للانضمام إلى مجتمعك المهني.
Regardless his complain was right or wrong, as a manager you should acknowledge it & keep on apologizing till the customer calm down, then it is all about a nice Gesture from the manager so the customer can leave happy & forget his complaint.
Keep in mind Customer is always right.
