Poor pathetic service from SIZWE HOSMED

I am very distraught after receiving a final demand letter today for non payment of a hospital account. Never have I experienced this before from any company or organisation. Being told that if I don't pay immediately, I will be handed over to attorneys and be liable to pay the legal fees as well as the outstanding balances. The outstanding accounts are for services in January, February and March 2022, Which were short paid by the scheme. There were a few issues around the accounts, but it was updated and corrected by the hospital's case manager, but still the scheme delayed the process and still haven't paid to date. I have done many follow ups from my cell phone, wasting my airtime just to be told it is in the process of being paid and that there is a backlog with payments. Why is this my problem as a member??? What also puzzles me is that my daughter was in hospital in April, but that account was fully paid? Why was the later dated account paid as opposed to the older ones??? After calling customer service on Monday I was advised that the accounts are in the process for payment, the same response as every other time I have called. I asked to speak to the manager, but I was told that the account is currently with a team leader (this has been the case for weeks now). What does that even mean and why am I not allowed to speak with someone in charge? It's unacceptable that the scheme is not honouring payments from their side, yet I am expected to make full payments monthly without any backlogs. I cannot afford to pay the outstanding accounts as I do not have the funds to do so. I am utterly disgusted with the awful service I have received! I need these accounts to be paid immediately in order to save my credit record from going down the drain! This could ruin my life if not resolved ASAP!