1 Year and my account is still not sorted!

was admitted to Jacaranda Hospital January 2017, ever since then my account is still not sorted out, and every couple of months I get threatened with giving me over to credit bureau.

I have send numerous emails for a year long and have spoken to Mandla Tshabalala and Sizana Mpofu from Rivonia offices. My account number is ********** 574

My medical aid says that I must not pay the outstanding account because " The shortfall on the claim is due to the Hospital charging above the agreed negotiated rate and the Hospital is responsible for the adjustment on the account. "

Mandla / Sizana and Riccardo says " Please note that on the Authorization the scheme approved the full 21 days- and this account was invoiced correctly on our end. There was however 0.5 day for 30 min rule that was not credit. The patient is liable for the balance because the medical aid short paid"

The more I ask what this means nobody can answer? I need this sorted out? If I ask my medical aid they say do not pay it. What must I do?