Pathetic Service from Vodacom

My poor experience with Vodacom has lead me to this platform. I have had various contracts with the above mentioned service provider which I would not regret except for the last two, from this two, the first one I took as a sincere mistake but now it is no more a mistake. I have called in on various occasions starting from the 23rd Of February 2021 to cancel the contract, The lady then explained to me that my contract will end at the end of February and I was due for an upgrade which I refused and she still tried to push the situation and if I can say she “refused” to cancel my contract. She then did not assist me as she said that the system was down and when it comes up then she will do the cancellation and email me the confirmation, I never received the confirmation and she did not cancel my contract as I was billed the next month. I then called and the same happened they said they will get back to me and call me and email me but non of that. They said they will listen to the voice recordings and act accordingly and that I will not be billed again. I was billed in March and for an amount I do not agree with as on taking up the contract I was issued with a promotional SIM card which once again I did not ask for but I was given the card and once the contracted ended they started billing me for it. When this was queried they said they will cancel the contract and give me a call to confirm or an email.Here again they where going to listen to the recording and contact me but I have not received any feedback from vodacom. Now in April I have received a bill again for something I do not have anymore which is the promotional sim and the contract which was supposed to be cancelled, so Vodacom is now enjoying my money two months in a row. I have been asking for this contract to be cancelled for a while now with no glory. This is very pathetic. I will never make a mistake to promote or advise anyone to deal with Vodacom.