Worst service yet

This morning i received my statement via mms. I notice that there is almost R300 more charged o call the call centre and they say that a 2gb is charged to my account on monthly basis. He told me that it was done via *111#. I then told him that i have always baught R55 extra airtime in order for me to buy my data and i have already been using my data as i have 1.4gb remaining. I then told him i never signed up for that and he said ok he will remove it. He then said that i will still be required to pay for the bundle this month and next month. I then said that is crazy. Why must i pay for something i never signed up for. All i ever use is my airtime to buy data and thats all i use for the month. Why must i pay for this and then i could hear a voice or 2 speak in the background and then just complete silence. I held the phone until the time on call was 17 min 7 seconds and when i still couldn't hear anything i put the phone down. This whole experience has been dreadful and i did not expect such terrible service from vodacom