Bad Attitude & Incorrect Booking

I called last week to the Medicross Roodepoort Dentist and spoke to the receptionist there. I asked if there was availability and was up front that they were fully booked Saturday and the next Monday, then proceeded to book a 2pm appointment for the Tuesday(12 Jan 2016) for my wife. She was told to be there 15 mins earlier to fill in forms. She arrived there much earlier today and filled in the forms and was told that her appointment was yesterday for 2pm ie. the Monday which suppose to have been fully booked and was told to rather come tomorrow. She makes my wife sit there for at least an hour hoping that someone will cancel their appointment!!??This I find absolutely acceptable!! This same dentist receptionist has a fat attitude if you don't keep to your appointment on time and makes you wait at least 30mins as a penalty if you do. It's disgusting how you treat your customers. I have attempted multiple times to call Pieter the manager but he's cellphone goes to voicemail. Please remember Medicross Roodepoort that we are your customers and we are the reason your salaries get paid. Show some respect to your customers.