Rude response from ER Consulting Accounts

I can't fault the doctor - but what a rip-off! I have often used ER 24 at Lenmed Klerksdorp but not again! I have seen bad reviews on social media but chose to ignore them. I am a recently diagnosed diabetic and ended up there with stomach flu. I was treated well but seemed to feel many things were really not needed! I noted that when the account came a huge shortfall of close to R1400.00. Then there was a claim from the hospital for over a thousand Rand! The following day I had to go and see my GP because they never bothered to sort out the Tummy Flu! Long story short they used all my medical aid in one visit. When I had the utter cheek to email them and query the account I got such a rude reply that the medical did not cover the full amount and I must advise them when I will pay the outstanding amount. I have emailed them 4 times requesting a break down of the account because there is no way it can come to that amount, I don't know what is so hard for them to understand - I know what was done and what treatment I received. The only conclusion that I can come to is that they don't know and are unable to furnish me with that information! Last year they hounded me telephonically because there was a short fall, I paid it and they carried on hounding me! When I had a chance and called back they did not know why I was being called - since the amount had been paid - the gentleman concluded it must have been a call to say thank you for paying! My concern is that if this is how their admin is - what type of medical attention are we receiving? Especially when you have to go back to your GP the next day. Pathetic really!