most unacceptable service disgusted!

I went for bloodtests on the 10/02 firstly I needed to pay upfront as I am now on a smart plan which I WAS NEVER NOTIFIED OF THIS CHANGE!!!!!I submitted the quotation with proof of payment. I was then asked to send a Invoice I resubmitted the quote, payment and invoice after numerous calls I have still not received a refund it s always empty promises. 2ndly went for a procedure obtained authorisation which was paid just to find out later they put through a jounal keeping me liable for R764.00. 3rdly they required a medical checkup with one of their service providers I went for this is in Feb also to find out they short paid R900 which I need to pay. Why bother with all of this if you still need to pay for the above this is uacceptable.