Vodacom not interested in clients best interests

I got an upgrade on my phone and was ******** to all these applications that you have active and running in the background. After receiving a bill of R4900.00 which is more than the bond on my house, I immediately queried what is happening? I wAs told to go in store which I did, the gentleman who helped me again had to phone into vodacom as nothing can be done without always having to phone one of the helpline numbers, the lady who answered was extremely rude to her own colleague who was in turn trying to understand my bill. After a while I was transferred to the data dept where a gentleman had to step by step go through my phone with me to make sure certain settings etc were switched off to prevent unnecessary data usage. He himself said it was irresponsible and bad customer service of the consultants at the store when I got my new upgrade to explain or show me these applications so I understand the phone they sell to me. All I can say is the personnel in store are lazy, the quicker they get through a customer the better. They are definitely not interested in informing customers of the product they are buying. I am disgusted and now have to sit with the repurcutions of the bill.