BANKMED AND MEDI PRACTICE PLAYING DICE ON MY ACCOUNT

I must say, I am beyond frustrated with the services provided by Bankmed and Medi Practice. My mother had a spinal surgery on the 6/6/2019 and a certain Dr Munthree assisted with the surgery as he specializes in spinal surgery. The 1st claim was submitted was for an amount of R 23,268.27 & only R 18,554.80 was paid. I queried this & Bankmed said doctor had to submit a motivation so they can pay. I believe this was sent and instead of getting better, things went south quickly. Another claim of R 5,532.90 & full amount was granted. Few weeks later the same R 5,532.90 was reversed, another claim of R 46,020.31 was sent & only R 33,886.70 was paid, thus leaving me with a debt of R12133.61. I contacted Medi Practice who is in charge of the Doctor's books & they advised that Bankmed advised them to resend the claims once more. Today I receive an email from Bankmed, & guess what, I now owe the doctor R15,873.77. How? Why? So it went from R4 713.47‬ to R15,873.77. This is absurd. Why does Bankmed and Medi Practice play dice on my account? Why not do one thing and have this issue sorted out? It is almost September and I am still fighting for June's issues. I do not have R15,873.77 laying around somewhere. Please fix my account. PLEASE!!