Telkom makes it impossible for you to cancel services

For some reason when you tell Telkom "NO" they assume it's a yes and proceed to take your money even months after your contract has ended. I have been struggling months to cancel my NON-EXISTING contract. My contract ended July 2018 and still they remain to take my money. My original contract was R120.00 per month, and since it ended they have been taking R200.00 pm. And everytime I try and cancel it, there's always a ****ty story, "Sorry ma'am you can not do it over the phone, please go into a branch" Then as soon as I go the a branch they tell me I CANNOT CANCEL IT AT THE BRANCH BUT NEED TO DO IT VIA PHONE. This is a JOKE! Then after several attempts to get all my details to cancel it after linking my account on the Telkom website, they tell me I can't cancel it as the service is suspended! HOW IN THE WORLD DO YOU CANCEL SOMETING WHEN TELKOM MAKES IT IMPOSSIBLE. I AM SO FED UP WITH THIS! I refuse to pay for something I DID NOT AGREE TO!! I can't go on with this. I want to cancel any connection I have with Telkom as they are the most unhelpful service provider!