Cancellation of contract

I am very disappointed with Telkom, had a contract with them which ended 31 August 2019, I called them personally on the 2nd of Sepember because they have debited R162 from my account & I asked them why, then I was told that I didnt cancel my contract online, I then asked the agent to please do it while I'm on the line with them, cancellation was done by her manager , I remember, she even asked if I wanted to continue using the number & I said no, to my surprise my account was debited again on the 02/10, I called my bank & requested them to reverse the money, because I do not owe telkom nothing, guess what? My account was double debited again this morning R324, i am so angry at telkom, i dont have any deal with them, why are they still debiting money from me, I needed to go to the doctor with that money as I'm sick , I will never ever deal with Telkom & will not recommend it to anyone