Recurring data sent and not requested but billed!

Last month around this time of date i received my normal 200 airtime and 25 smses,however coupled to that was a recurring data of which i had not requested. After phoning the hapless customer service and speaking to Thapelo who did my upgrade i was assurred i would not be billed . I was billed and it seems i will be billed again for this as i just received an sms notifying me that i have been resubscribed for 100 mb of recurring data! Why? Who? How? An investigation is underway reference no.794907 but still this happens? I need you yo call me and settle this issue as i am spending quite a bit of money trying to fix something i never broke! On my Q5 for 2 yrs i never received any data why oh why would i start now? Very disgruntled and disillusioned customer of many years.