Vodacom and their pathetic service

Vodacom, can you please explain to me why your call centre staff took it upon themselves to DECIDE FOR ME whether or not I would like to change my contract to something entirely different and INCREASE THE MONTHLY PAYMENT THAT GOES OFF ON MY DEBIT ORDER???

I am sick and tired of having to deal with Vodacom and their pathetic customer service and staff who feel they can do whatever they want. A call centre agent called me to make me an offer for a data deal of R89 per month for R150 airtime every month. This contract was for 2 years. I am assuming the 2 years has ended that they just DECIDED FOR ME to update or change my plan to Red Flexi 130 Line Rental. Which is not okay! No one has called me to ask my permission regarding this. I am a student and I am unemployed. I can't afford R130 every month for something I have not consented to!!!!

I want this canceled immediately. I am not making further payment and if this reflects poorly on my credit history, you will have another problem on your hands.