BILLED after requesting cancellation!!!

I have called on 2 separate occasions to have my medical aid CANCELLED!! I personally spoke to the agents and said I want my medical aid CANCELLED as I joined a new company and they are with a different medical scheme and they will be paying my medical aid. I even skipped the payment for MAY as I asked it to be CANCELLED. This morning I received a SMS as a reminder that to say that my account will be debited on the 01/06/2023. I called in waited for 18minutes and when I eventually get through to someone I keep getting transferred all over the place. I finally got through to ASANDISWA who told me no cancellations can be done after the 24th ( Keep in mind I've called the prior week AND the week prior to that to have this CANCELLED!!!!) she then proceeds to tell me I will be debited double and there nothing you can do about it. When I explained to her that I have called long before the 24th she recommended that I move my funds. And yes then I'll be charged for bank charges all because of your people who cannot do their jobs. I spoke to her on 29/05/2023 at 14:00. She said she will be going through the withdraw with me and then put me through to finance. She recommended that she call me back. I am still waiting on the call and still SUPER annoyed with Discovery!!!!! CAN SOMEONE WITH A BRAIN PLEASE CALL ME!!!!