Settlement letter mission and more

I called Cell c for them to provide me with a settlement letter to settle my account due to the fact that my monthly debit order fee went up without any explanation even after calling their customer care. After being thrown back and forth I noticed that this is not battle that I'm going to win, I then asked a lady at the cancelation to give me the settlement amount which I paid while she was on the line. Today I called the same department to cancel and only to find out the settlement amount that was communicated is actually incorrect I still have an outstanding amount. Asked to speak to a team leader and I was told that she is busy she will call me back. I will never deal with cell c ever again as they don't know how to treat their customers better and thank you as I about to sign out