No feedback / communication with customer

I am appalled with the lack of communication as well as the customer service I have experienced with Discovery Health. I submitted a medical claim on 30/03/15. The doctor's visit took place on 31/01/15 hence, my submission was within the allowed 4 month period. However, the practice number on the doctors invoice was incorrect. Whilst trying to get the correct information, I was told that I need not worry as my claim was submitted on time and I will still be paid once the information has been corrected. This was rectified and resubmitted to the claims adjustments department on 15/05/15. I have made numerous calls to get feedback. Eventually, on 21/07/15, I was told that my claim was not submitted on time therefore R0 will be paid. I was told I would be contacted within 48 hours. I did not receive a call hence, I called once more. I was then told that I was not contacted due to an inquiry which was in progress and that the operator who I dealt with (on 21 July 2015) will contact me. To date I haven't received any contact from anybody within the organisation. I cannot fathom why it is so difficult to keep a customer informed as well as why I was told that my claim was submitted late!