WORST SERVICE EVER

I cancelled my Netstar Contract on the 16th September, the agreement was to be debited at the end of September. It now November and I haven't been debit but it shows I have an outstanding balance. I called in last month and spoke to lady who was meant to call me back with an answer as to what is happening with my account. Its now the 11/11/2021 and she never called me back. I called them back today and spoke to Khanyisa who refused to give me her surname or help me. Her managers name is Barry once again no surname. This is worst service that I received and still havent been able to get any help, I called back and the line was dropped in my ear when I asked for proof of cancellation. I really someone is willing to help