The worst customer service

I have been with supersonic less then a year never had issues with the service or LTE but when I decided to cancel I was told of cancelation email that needed to be sent I did that I was debited for who knows what els costed me R 1000 late I paid it my contract was suppose to be canceled the end of November 2020 as per the email I sent I phoned in 5 times to confirm if they got everything and if cancelation was taking place I phoned the end of December just to be told that they never canceled I'm active I already have another service provider that Im paying and supersonic still debited me phoned in 5 times in January I requested 2 times for the manager or supervisor or team leader to phone me still nothing to day is the 26th of January 2021 and I just received another invoice for a debit order to go off I'm sick of this bull **** supersonic has got the worst team ever this is just so annoying and costly because I'm losing money and bank charges for reversing and the debit orders going through don't