Poor Customer Services

I contacted telkom customer care on the 17th of January 2020 to update my banking details, and according to my knowledge the information was updated and I was adviced that since I updated the details so close to my next debit order date, I have to do a manual payment, which I did, however a 2 months later, I received my monthly statement stating my account is in arrears, and I called the customer care and I was told that they ran a debit order and it got rejected and I then realised that my banking details were not updated, and again U had to do a manual payment for feb and march , however they went on to suspend my services stating that I am my account is in arrears, though according to me my account is up to date and telkom didnt even bother to do a proper investigation and I also called the customer care in march to have them fix my account balance and I was told it will take 72 hours and now I have been waiting for over 250 hours with no feedback and my services still suspended. I also want to cancel my contract, its coming to an end in may 6 2020 I am unable to do so.