Ridiculous charges/Bills

Vodacom has added extra charges on my bill which I did not apply for. This is not the first time they charging or putting extra contract that I didn't sign up for. Each and every month I need to call vodacom to fix their mistakes on my account. I am so tired of vodacom because their service is very poor and annoying. Please make sure u remove everything that I didn't apply for on my account. The only bill I know is R134 not R 879. I can't pay for someone's service. You are taking people's money. I want to move from Vodacom to another network because I can't be wasting my time calling now and then. You guys are doing a ***** on my account. My bank account is no longer safe with you and I don't feel safe anymore.