Horrific service

I cancelled my medical aid at the end of August and requested a refund. 3 weeks later nothing had happened only to find out I need to log in a separate refund request. That makes zero sense at all. 1st October my vitality for R305 still goes off. 30 mins wait on the call centre speaking to 4 people and eventually I give up. Discovery now wants my full bank statement to show the amount that has gone off because they cannot find this on their end. I have already provided a screenshot of the transaction with my medical aid reference proving this is my account. Refund me and cancel this Vitality immediately. I have zero confidence this will be cancelled for November onwards.