Know what's going on in your office, consistency!

I wanted to make an appointment with Dr Dalia Hack specifically for Saturday morning, as I need a new prescription & need to be fasting when taking my blood tests. I mailed Medicross with a list of questions, which my appointment depended on. Sharon Boks contacted me via email & confirmed my appointment for 9am with Dr. Hack. I asked the same questions in 3 consecutive emails, with no response. I phoned to ask my questions telephonically before confirming my appointment. Then I was informed that Sharon had already left, but that Dr. Dalia will not work on Saturday. She answered my questions. On Friday I mailed Sharon to confirm that Dr. Hack would indeed be working on Saturday. Mrs Boks responded that the doctor would not be working. I rep**** with more questions, with no response again. I asked Sharon for another email who could assist me with answering my questions in the future as mrs. Boks was not successful in doing so on numerous occasions. I specifically asked for this doctor, and it is unacceptable to make a booking with a specific doctor, to find out that they will not be in on the day requested. Your customer service emails keeps bouncing back. Communicate!