Capitec allows unauthorized payments

This is my second hello Peter complaint and Capitec has not bothered themselves to address my problem. I cancelled my rain subscription in January and got written confirmation on the 3rd of February that it was cancelled. Rain still deducted my Capitec credit card which they had never done before as I always did the transaction myself. As I am unemployed I called Capitec to ask them to reverse the payment and they refused even though I have written proof that I had canceled my rain subscription. I am unemployed and trying hard to keep my account in order yet capitec refused to hear me out. They refused to see the email as proof of cancellation. They simply told me I must take it up with rain and that was it. So our money is not safe and capitec refuse to reverse unauthorized transactions. Other banks allow us to reverse such. Worse I have proof in writing but nobody wants to help me.