Vodacom with incompent agent

Vodacom did me wrong. I have three accounts with Vodacom now. One of my accounts was expiring at the end of September. So, I called in on the 31st of August to cancel the expiring contract. Please note that before the contract expires, you need to cancel it one month before the expiration date of the expiring month. Ok, the guy from Vodacom advised me not to cancel completely, he offered me a new plan of 70 GB with 100 Voice minutes for 140 rand a month, hence I stated that I do not need the phone yet, I emphasized with him that NO, I don't need data because most of my time I am home I need more Airtime/Voice note bundles than data, I have installed home WiFi, he proposed a plan pf 179 a month with 20GB and 250 rand voice notes bundles, I agreeed to that, now 01st of October they have loaded me with only Data without the voice note, which I have emphasized that I do not need it. Now it is a pillar-to-post scenario. I asked them to retrieve the recordings, and they will understand and get the picture of what I need and what I have agreed on. Now I am stacked with the Data I don't need for the next coming 24 months. I asked to cancel this contract as it is a new one, they are telling me about the penalty, so it means I should take the blame for someone else. They are *********** with their responsibilities. I am taking matters into my own hands; they will hear from my lawyers. They will cancel without any penalty fees.