NU DEBT - ER CONSULTING

I was advised that I have an unpaid account at ER Consulting, eThekwini Hospital. I have a subsequent response from my medical aid, who advised me that the Trauma Unit ( ER Consulting) has charged me 300% of medical aid rate. I have asked for some correspondence whereby I acknowledged these charges. To date none received, yet I am harassed almost every hour via, sms, email and telephone call for payment.