Customer Billing Dissatisfaction

I was billed for a subscription that i didn't even subscribe to. I went to vodacom Canal walk last month I.e in March, to query as to why I am being billed for a subscription, that I'm not aware of. The consultant told me, she will try to remove all subscriptions, and sent an sms to remove subscription from my phone. She said that this month, which is April, my bill should be rectified. This month, to.my surprise, I was billed again for subscriptions that were supposed to have been removed last month. I went in again to Vodacom canal walk 21 April 2018, where I was last month. This time I dealt with a different consultant, Abashia Bailey. I said to her that I would like to know, why I'm continuously being billed for subscriptions, and that i have been there last month to query the same thing. She then told me, that its being billed from the beginning of the month, but meanwhile, I was there in March already to have it removed. I asked her if she could see on the system, if it shows, that I was there and for which query. She said that she couldn't see, that I was there. How can a big business not log a customer's query or fault with the date, etc on the system, as proof that the customer came to query a concern or fault, for the next consultant to see, that the customer was there before, and for the same query? What a damn *******!