VODACOM - *********** or **********?

On 30 July 2019 I called vodacom to cancel my data contract that was was started on 3 September 2017. Felicia informed me that I cannot call more than 31 days in advance. On 2 August 2019 I called vodacom again at 12:11 and Felicia informed me that the cancellation was loaded for the last day of August 2019. Ref: 1-***51 39. I noticed on 1 September that my contract received a new allotment of data. I was thinking that it will terminate on 3 September to be a completed 2 years. On 4 September I noticed that the data was still on the account and the account active. I contacted vodacom at 8:10 and Bongani informed me that the cancellation was loaded for end of September 2019. 1 October 2019 I noticed that my data balance is over 14Gb and that the contract is still active. I tried to contact vodacom via phone, smart bod but with no success. On 2 October I spoke to Simphiwe at 10:02 who informed me that the contract was cancelled and that the number is now prepaid. I informed him that I still received data and that I do not want a prepaid number. He cut me off. At 10:20 after speaking to 2 other operators who were totally uninformed and not helpful at all, I spoke to Sime who after telling me that the contract is prepaid put me on hold a couple of times and eventually had a conference call with me and another employee. Neither of the 2 ladies knew what was going on and after being on the line for over 50 minutes I asked that they sort out their mistake and call me back in order for me to be able to do my work. Today, 4 September 2019, I have not yet received a call back, my balance is still over 14GB and they are still going to charge me for it.