Non service with a premium price tag

I've been a customer since 2012. But the issues only started about 2 year ago. I will save you the pain and only focus on the last couple of weeks: My card expired so I ordered a new one@R150. Other issues after that made me decide to cancel my contract and I called them on 24 March. On that day I was informed that no card has been ordered and that there is a month notice period. I argued with the notice period and the agent was gonna call me back, but never did. On 30 March I got an sms informing me that my card is on its way to me. I called and was asured that I do not have to pay for the card. On 1 April a debit order was deducted so I have cover for April. On 4 April I submitted a claim. On 5 April I was informed that my policy is suspended, when I called I was informed that it was due to the outstanding amount for the new card. The agent reviewed my previous calls and confirmed that it was their mistake and said she will sort it out.On 5 April I got an sms to say they won't pay for the claim as my account is suspended. Again I called and now I owe money for the card again. I've called 6 times on the 6th and are still waiting on some manager to call me back.What more must I do?