Cancellation of LTE but still being Billed... Poor Customer Service

Account Number: *** App**** for Fibre in October 2018. Installation only took place in March 2019. Contract taken was for R807. Charged for 2 TIN numbers from October 2018 although installation only took place in March 2019. My bank account was debited on a monthly basis. Phoned Telkom on a number of occasions but problem was not resolved until July 2019. Although I phoned them every week they did not even come back to me with a resolution to the problem. When I took the contract I was informed that I could cancel my LTE at any stage. Cancelled LTE in April 2019 but still being billed on a monthly basis. Phoned last week and was informed by Phuloso that the agent did not activate the cancellation. Phoned again today spoke to Violet Matlou and she informed me that the contract cannot be cancelled therefore the account is still active. Asked to speak to the Manager, Violet then informed me that her manager Levi Maken said that I must go back to the Telkom shop where I placed the order. He did not even speak to me to find out exactly what was the problem and try and resolve the problem. My account is being debited for R4572.71 and I have to incur the bank charges. Telkom is the worse Service Provider and they do not resolve any problems that customers experience.