Vodacom refuses to cancel contract.

Hi, I have a contract with Vodacom number ***. I contacted them numerous times through e-mail, call centres and live chat. They informed me that my contracted has been cancelled. I got a new invoice that shows my number was not cancelled an I called the department, I spoke to a Lady named Tshwarelo who was rude, she said her manager Patricia Mnisi has knocked off. The lady refused to cancel my contact even though the 24 month period is up, she refused to refund me and she cut my call, I got transferred to the cancellation department the lady cut my call at 17.09 on Wednesday 15th January 2020. Please can you cancel my contract and refund me. The number is question is *** but contact me on *** or email ***