MTN never cancelled my contract and they still taking money from my account

Hello everyone, I cancelled a contract instore at MTN Liberty Mall Pietermaritzburg on the 19th of September 2023. The manager Raymond assisted me, I cancelled my 30mbps internet package because the contract came to an end, end of Aug 2023. I then app**** for the unlimited package. The manager never cancelled my contract as per the confirmation of cancellation document he gave me and MTN is deducting money off my account again at the end of October for a contract that was cancelled on the 19th of Aug 2023. I went to the store on 30 August and queried why they have deducted the money off my account if the contract was cancelled, the lady at MTN had a look on the system and told me that the contract is cancelled and the last debit order will go off on 27 Sep 2023. Again they have deducted the full amount for the "cancelled" contract at the end of October 2023. I then phoned the store at Liberty Mall and the lady said she will phone me back, she never did. So I got in the car and my wife drove me to the store. I am disabled and don't need nonsense like this. At the store they told me to join the que, I told the staff member that I cannot sit for too long as I am in a wheel chair and had several unsuccessful operation on my spine. The guy then called me to the front and very arrogant told me that they cannot help me I need to contact the cancellation department. The more I tried to explain him that the cancellation was done in store and wasn't cancelled the more he ignored me. I contacted the cancellation department today 30 October 2023 at 15:40pm and the lady I have spoken to Judie who (very arrogant as well) also refused to give me her surname told me that the store never cancelled the contract and it is still open. I told her that it is not my fault that they never cancelled the contract and the store told me to phone you. She then told me there is nothing she can do and adviced me to go back to the store and ask them why the contract cancellation was lef open and never cancelled. I then told her why is it my problem to go to the store its not my fault they never closed it. I also told her that I have been at the store and they told me to phone the cancellation department to sort it out as they have submitted it The lady then told me that I was suppose to phone in and cancel the contract, no one told me to phone and cancel as it was already done in store with a reference number. She then said the store doesn't cancel contracts. She then told me I need to go and ask for video footage for the 19th of Aug so there can be proof that it wasn't my fault. So now they are deducting money from my account again. This is really useless service from MTN, I am not going back to that useless store as I am disabled and cannot run up and down to sort their mistakes out.I need this to be sorted or I will go to the bank and reverse the debit order as this is not my fault.