Find out what your competitors are charging, how fast they are, and if they offer any bonuses.
Then counter with improving your turn around time, and adding a perk or two. Offer a sale on your items to bring back the customers, once they see your new additions and quicker services you should start to see some improvement.
Also, make sure you're super friendly. Sometimes the thing that steals away customers is that your competitor is just friendly, and therefore, more of a pleasure to work with.