Intentional disregarding of contract expiry by Vodacom

Rating is actually -10! My 24 month wifi contract expired on 05/03/2023. I sent email to *** on 05/02/2023 stating that I do not want to renew the contract nor have a month to month signup on expiration. A reply from Chumisa Bambilanga informed me to call *** or email ***. I emailed earlycancellations on 06/02/2023 stating my request of cancellation on expiry. With no response I sent email again on 08/02/2023 for acknowledgement, no reply received either. I then called *** on 20/02/2023 and spoke to a Frans for 13 minutes explaining cancellation on expiry. He informed me that the contract would be cancelled on expiry and informed I would be informed via email. After no response I visited a Vodashop on 16/03/2023 and was informed the contract was not cancelled! It seems that Vodacom are intentionally not cancelling the contract to submit debit orders to my bank after the contract has expired. I think that I have done everything a reasonable person could do to cancel this contract. I would not hesitate to lay a charge of ***** should Vodacom try to pass debit order after I cancelled the contract. I have copies of all email correspondence as well as a screenshot to prove my call on 20/02/2023.