Vodacom is a bunch of *******

I don't know where you get your information from but your calculation for my data usage is not correct. Normally I pay R1600 which gives me 10GB per month. I have Wifi at work and home and I manage my data usage well. My statement for Feb 2018 escalated to a whopping R8500 which didn't make any sense! I logged a call to find out why my account is so high. The person that did the investigation advised me that I am using a Samsung Galaxy and mentioned a couple of apps that were using my data. I told him that his information provided is wrong and that I am using an Iphone (I upgraded almost a year ago) and I don't have any of the apps he mentioned. Vodacom then advised me that as a gesture of goodwill they will give me a 'discount' on my account and I now owe an amount of R4500. If I was guilty then you wouldn't have given me discount. You run a business not a charity. I received a data usage report and the Imei number reflected on the report is not even mine! How do you run a business Vodacom? Please rectify your system as this is an absolute disgrace. As a customer of almost a decade I am very disappointed