Not happy with Dstv

My subscription has been blocked because they say i reversed payment. They deduct via debit order . The debit order went off on the 20th Dec 2021. Then on the 18 Jan 2022 they claim i reversed the payment of which i did not do. I called and they asked for a bank statement which i sent. I called again and now they are asking for proof of payment. If they are the ones debiting my account where am i to get this. I feel so helpless. How can they be so unhelpful and not be willing to help one of their customers. This is unacceptable.