If your using Bonitas you might end up at a public hospital because of their incompetence

Bonitas debited me less than my monthly contribution for the past 2 months. I have sent them emails, they don't even bother to respond to those emails. Decided to call them with my airtime and was put on hold wasting my airtime. I'm told there is an outstanding amount but they continued to debit me lesser and lesser. Had I not called I wouldn't have known that there is an outstanding amount. On the statement it say says risk contribution. Your turnaround time is so bad, even when asking a simple question it takes you days if not weeks to get back to a person. When were you planning to inform me about the outstanding amount? What is the way forward and how to resolve this ?It means if I could be admitted my claim will be rejected because of your incompetence? My airtime ran out while talking to them, they haven't even bothered to call me back.