Colonial Medical Assisted Devices

They told me my item is being shipped then a week later they tell me it wasn't the right ones in stock so I change my order to what they said was in stock. They say it's being shipped that day. almost a week later I still don't have any product and when I call about it the manager tells me it'll be shipped either today or tomorrow and they can't give me any expedited shipping? How is that making sure the customer is satisfied?