Disgusted in Vodacom

I have been getting calls since March for an upgrade. I explained to your consultant that I am not interested. Now on my vodacom app I see my bill is Almost R1000. I called your call centre on Saturday to enquire what is going on. Apparently I have requested for an upgrade which I did not agree to. I have requested for the telephone recordings and was told it would take 72 hours and to date no one has contacted me. Is this the way Vodacom does business. I have been a customer for very long. I do not want your upgrade because I have Wifi at home and work. Why would I need extra Data. I request the phone recording and want this upgrade cancelled immediately or I will take this matter further.