Paying for a service not received

My bank account has been debited by WebAfrica multiple times over the past few months despite me not being provided their services. I contacted WebAfrica on their WhatsApp line to request that they cancel any existing relationship with them and stop debiting my account as I am not being provided their services. I provided proof of the debit orders and my bank statements were requested. I informed WebAfrica that I was not comfortable with providing my most confidential and personal documents and requested my query get escalated. The chat with the agent was ended with no resolution. My bank has initiated a stop order request but advised I write a review in an effort to have my issues with WebAfrica resolved. Any help or advice in this matter would be greatly appreciated.