Bonitas Refusing to cancel my Policy

I have never been so happy to have cancelled with this business Bonitas. This is awful service if you can call it service as I have received none. I cancelled my policy in April this year, they continued sending me emails and telling me I have outstanding payments. I then called their client services at the beginning of June and told them that I cancelled the policy why are they sending me these emails. I was told that my policy is still active, I then was asked to send proof of my cancellation request to *** I sent this on Monday the 5th of June advising that I want the matter resolved by close of business Tuesday up until now I have not received a response from them. It is against legislation to make it difficult for a client to cancel their policy and you guys at Bonitas are really making this ridiculous. I already have another medical aid and what you are doing is against the law I cannot have two medical aids. I want my policy with you cancelled with immediate affect and back dated to the original date I requested cancellation in April. This needs to be sorted before close of business tomorrow.