Fraud and unprofessional services

I booked an appointment with Dr Shai Oren for a scan- When I called the receptionist to make the appointment Khanya and asked if they accept Momentum Health Insurance and gave her my details she assured me that she called them to get authorization - she was in such a hurry to leave the office instead of doing her job properly - this was on a friday like a week or month before my appointment - the total cost of the scan was R1800 to which we had to pay a co payment of R900 at the appointment and they would have to claim the other R900 from our Medical Insurance - on the day of our appointment - they took my details again and then asked me if I had called Momentum to get authorization to which I replied No as I was unaware that I as the client had to do so - their communication is disgusting. Before even going into the appointment one of the receptionists called momentum and could not get through to them and said she will try again - I then asked what happens now and she said she will call again which she did not do while we were in the appointment and again when we were done with the appointment still did not complete her job or communicate that they did not get authorization from Momentum - Dr Shai Oren racked up a bill of R1 303 for blood tests to which we asked how much will the blood tests cost before even doing the tests and he replied that there is no cost as the medical aid will cover it not even confirming with us just doing the test and expecting us to pay to which we are now paying off. While we were in session with Dr Oren the receptionists still did not call the Medical Insurance and didnt even tell us that they did not call again. They proceeded to claim the full amount R1800 from our Medical Insurance after the appointment knowing that we paid R900 on the day - to which the claim was rejected- then 3 months later sent us a sms saying we have an outstanding amount of R900 and that the Medical Insurance didnt pay - changing their story over and over - when we sent proof of payment that we paid R900 on the day and all they had to do was claim R900 from our medical insurance to which they did not do they then said we are liable for the R900 but they fraudulently claimed for R1 800. We called Momentum and they said the Invoice needs to be amended which still Dr Orens receptionists could not get right. Up until today they are sending us Invoices for R900 they couldnt correctly claim for and sending us threatening smses. I am almost 9 months pregnant and they are stressing me and my baby out because they could not do their job properly. They should be investigated for fraud. They lack professionalism and proper communication skills.