Vodacom is the con man/ contract cancellation

I had contract that was suppose to end November 2020. After that Vodacom continued with monthly debit orders at a lower price without consulting me. Mind you I was never informed about this whole thing that I will have to call and cancel. On the 1st of Feb 2021 I called and made arrangements that they cancel the contract and I was assured that it is done. On the 15 of Feb I get debit order and I returned it because I have canceled the contract. March 2021 I get statement as an email saying that I owe the Vodavom R350. On the 15th I called Vodacom and spoke to Micayl. I was not happy because as I was explaining my problem he didn't show interest but advertise their products. I am using my airtime and time but without assistance. I told him to stop selling products and deal with my problem because at the end of the day they will send me to credit bureau. He then said he is escalating my case and promised that within 24 hours I will get response. I even asked Micayl to give me call reference but he refused. I have worked hard for my credit score and I'm busy calling Vodacom with my airtime. I do not have money and time for all that. Vocacom is the con man. I dont even use that phone cause it was a present for my nephew and I keep on paying for nothing. I am annoyed at this point.