It's actually better NOT to make a sale than to sell your products or services to a customer who is not going to be happy and in the end cost you money, time and reputation. The old adage "you can please some of the people most of the time but you can't please all of the people ALL of the time" reminds us that no matter how hard we work at taking care of our customers, we are still going to wind up with an occasional problem.
Simple suggestion to avoid this: Be sure you thoroughly explain your products/services when the sale is being made, including warranties, shipping information, etc. You don't need to cover every detail but a little experience and you will learn which details create unhappy customers.
Learn from your mistakes. If you have an unhappy customer, decide what went wrong and make corrections that will ensure the problem doesn't come up again.
Our customers are as imperfect as we are, so if we want our businesses to grow and prosper we must learn to deal with the imperfections. RiverSouth Marketing