DISCOVERY payment and service is shocking!!!

Processed a claim via their mobile app. I took a photo of the invoice which was automated on the app. I then got a rejection saying it wasn't clear. I then resent the same picture which was then processed. They then claim that of the R1300 charged for a consultation with the orthopaedic surgeon was above their rate of R458. My local GP's rate of R660 is fine however!!! The inhouse procedure which he charged R400 for also was well above their standard injection rate of R132. Then for the Macaine, Celestone and medical utensils used suddenly they cant read the NAPPI numbers again so no reimbur*****t for those although the consult and procure they could read fine... seems to me like they will only pay when is suites and the amount that suites... Speaking a consultant who didn't have an answer on how it works, I was put on hold for more than 10 minutes afterwhich I just put down the line!!!!