Vodacom bad service

Just had the most unpleasant customer care service by vodacom. Had a query for them charging me for something I didn't ask for and they also trick customers by sending an sms to say you are going to be subscribed to something if you don't want the item you must dial a special code to stop it from happening instead of the other way around where if you want the item then you can dial the special code to subscribe for it. Back to the customer care the first agent I spoke to did not want to ask me a different security question when I told him that I do not give my ID no over the phone to anyone he must please ask me a different question. He said he can't so I asked to speak to his manager and the manager said that she doesn't know why he didn't want to ask me a different question because he is allowed to. The manager then wasn't able to assist me and said because I did my upgrade instore and not online she can't assist me with my query. What is the use of Vodacom having a customer care phone in service then if you still have to be told to go into the store to solve your query. The manager was also very disrespectful on the phone not allowing me to speak finish and speaking over me. Vodacom really needs to be checked for how they cheat people of their money buy subscribing them to things they don't want and just sending an sms as a notification.