Cancellation of Contract not actioned

In April 2021 I cancelled a contract for end May 2021 as it had expired mid April. I was told to expect an sms confirming the cancellation within 48 hours . On 16 May 2021 when I had still not received the SMS, I visited a Vodacom shop in Cavendish Square, Claremont and asked the consultant to call the customer care and find out if the cancellation had been done. To not my surprise it was never done! I was given the phone to speak to the call centre agent by the name of Baxolile Mathontsi who confirmed that she did the cancellation right at that moment I was speaking to her. She even gave me the reference no and once again she said I'd get an SMS in the next 48 hours. Till this date the contract is still open. I have a new contract with Telkom since March. I cannot port the cell phone number until Vodacom cancelled the old contract. I am beyond frustrated with Vodacom. Every time I call customer care 135, i am told of high volume of calls and get transferred to some stupid Tobi virtual assistant. On 01 June 2021, this Vodacom sent through a debit order which I cancelled and stopped. They have no authority to debit my account. I would never recommend this company to anyone.