Billing me incorrectly

I am sick and tired of calling Vodacom to fix their billing error on my contract and them saying it's fixed, when I get my statement it is still incorrect. I was even promised that they will call me back but that was never done either. My contract has been upgraded on their side but I did not upgrade it and now I am paying for something I don't even have. I want my money back and an apology. Contract no. is ***.