Poor ER Accounts handling

Very very poor accounts handling from Medi-Clinic Sandton, I will not use the ER again, I'll rather die while on my way to another hospital that's far.

Firstly they don't know how medical schemes work, they send out invoices/claims with out information to support procedures perform and they expect Medical Aid to just process them. I had pay them directly and then to make my own claims which is not an issue because medical aid approved but that was after asking them on many occasions to provide information on their invoices.

They get 1 start because after over 2 months since I had payed them, a new invoice came out of nowhere and I was surprised why they're only sending the invoice after so long, So must i now deal with medical claims that were closed weeks ago because of hospital incompetence?