Contract cancellations

I called in to cancel my contract and start my 1 month cancellation notice moving to prepaid. The initial person I spoke with on that day didn't inform me that upon cancelling the contract I will immediately lose all benefits I had, to my surprise after an hour of cancelling the contract I checked and ALL the data I had was gone.I called back at about 15:00 only then it was explained to me that the benefits (Data) were removed. I tried to explain to the consultant that I wouldn't have said the contract can be cancelled on the 31st of March an extra 15 days later from when the contract was supposed to end if I knew or if it was explained to me that I would lose my data. How was I going to use the phone for an extended time without my data so I requested the cancellation to take effect on the 16th March. I was told what's done is done and it can't be reversed. I escalated the call and was told someone will come back to me (Ref no. ***). On the 25th Richard Makwara calls me and we AGREE that the contract will be cancelled on the 16th March. On the 15th March I call to check if the indeed the contract is cancelling I was told the contract is not cancelled.