How to restore customer confidence when things go wrong?

We should investigate internally why things go wrong and set brain storming to find team solution to restore customer confidence by answering questions start with how , when , where , and what around our restore solution . And we should avoid to repeat same problem and prefer to discuss the issue with customer face to face immediately and show them that we expect problem happen with our team and services but we have solution to restore trust and confidence with deal respect and ethic . And our value to customer to be problem solver not creater of it .

Admit your mistake or that things went wrong, fix the problem and apologize.

Great answer here by Mr. Saeed Mohamed!