Answer:
Listen carefully to the customer and avoid getting defensive or even offensive.
Step-by-step explanation:
The customer have every right to be angry since he might be ignorant of the work done and only act base on what he sees. In this scenario you need to listen carefully to his complain avoid been defensive and also avoid getting him/her more angry by been offensive. after he has laid out his complain you can then go ahead to explain why it is necessary to bend the hinge on the lid.