Capitec refuses to help

I shared a review recently about my experience with Capitec. The responded by saying the cannot help me stop Telkom taking money through a debitorder on my account.The contract with Telkom expired 11 March but they've been taking money every month. It's useless trying to contact Telkom. The communicate through chatbot. I am still in Canada and cannot sort this out in person and cannot believe there is nothing they can do to protect their client,me, from this .