Disgusting call centre and service!

I received a phonecall from a service provider saying R3543.60 owed to them was paid to me. I checked your website which indicated this was correct and payment was released on 7 June. I followed up with thebank and they said nopayment was made. This morning I phone your call desk to be told that pamentsin September 2017 were reversed and this amount was app**** to them. Why wouldthis be...the majority of my husbands medication is via his oncology benefit. Why was it reversed? Why in September? How can you reverse things in another financial year. Where was this reversal communicated to me. Where was it communicated to me that I owed Discovery Health money? How can these things happen 9 months later? More irritating than this is your call centre tells me they cannot phone me back and they cannot investigate and email me. I need to wait 15 minutes to speak to a manager who needs 2 days to investigate Surely this is not ethical Discovery! And why then would you tyell the service provider you had paid me the money WHEN YOU HAD NOT!