The best way to help your consumers with your business is to treat your employees right so they give better customer service, empower them so they can provide faster solutions, and to treat your vendors and partners fairly and with respect so they can continually provide the best product and services to their ability.
Thank your customer for complaining and mean it. Most will never bother to complain. They'll just walk away.
I have always believed that the way you treat your employees is the way they will treat your customers, and that people flourish when they are praised.