Furious customer

Ever since I joined I have had endless problems with my orders. Items have always been shorted or rather not received. Items have been shorted four months back. They don't contact you to ask if they can substitute it but simply do as they please and put whatever item they feel in your order. The inconvenience of then doing credit returns which takes forever is frustrating. Then you get brochures which you didn't even order but get billed for. I am so annoyed and furious right now. I am not going to pay for the extra 25 brochures which I clearly did not order. How is it that things can just miraculously appear on your statement. I want an agent to contact me and make sure they refund me on this. Why advertise items when the stock is low. Really this messes up a person's clientele as they under the impression the consultant is messing around. Come on get your people's customer service in damn order.