Customer service fun
spencerfry.com
spencerfry.com
Another way to reduce your email overhead is to have a good search feature on the website with an indexed FAQ.
Just a couple ideas for you. Not sure how intense your customer support queries are so this might not work for you in a cost effective manner.
Not because $4 is fair compensation for her trouble. Or because $4 is so much money that she should be happy.
But because they actually took a moment to consider what message a $100 refund sent to the customer vs what $96 would send.
$100 sends "Hi, we overcharged you how much? Nintety six dollars? Here, call it a hundred, keep the change. We weren't trying to skim six months interest on $96 from you maliciously and we're human and take a personal interest in your problem caused by our company and by us, we're not faceless and mechanical, we have kept your money but we've paid it back and more, have the small benefit of $4 and please consider giving us the benefit of the doubt and dealing with us again in future".
In general, most people have such terrible experiences with customer service that they go in expecting a negative experience, placing them on the offensive. If you're responsive, helpful, and personable then they'll flip right around and tell their all friends about how awesome you are.