Seriously?

Ordered a pizza by delivery , everything goes accordingly pay the delivery man R200 don't even take the change from him , use my significant other's phone to place the order , I'm in work she contacts meand says the delivery man is harassing her saying I paid him short and wants the money I mean isn't it your obligation to check the amount you received from the customer and why is he phoning doesn't the store have a policy in place for such circumstances I mean why would I go to the trouble of paying him short when I use this service quite often ... looks like il be making my own pizzas at home really unsatisfied and outraged by this , thou she wants to go and pay the money tomorrow I feel as if the business shud rectify they errors with the employees instead of harassing the customers for petty cash ...