There is nothing of greater importance to your business success then the people who represent your company. Remember, that you invested thousands of dollars to convince these customers to give your store a chance to win their business. Nobody has enough of it. It's the only commodity that you can't buy, beg, borrow, or steal. Today it's everyone's most valued treasure.
People take better care of things they own.
All you need to do is make a couple of phone calls. Quickly and easily you have solved the problem. Maybe now they will follow your lead and handle their own monkeys in a more efficient way. I was extremely bad at this when I first got into management. Nobody could pick up a phone and dial it the way that I could.