Vodacom online deals contradiction

I bought Realme Note 50 double deal online on a 24 months period contract.During my purchase over phone with vodacom expert agent,I asked that I need a contract that will not extend any form of service outside benefits that are coming with the deal.If the provided airtime or data gets exhausted then nothing should charge me out of bundles.

Now vodacom has debited me R3164 stating that one of my sim card has been making calls out of given bundles.I called vodacom to query this amount and a polite agent explained to me how amount came about and she escaleted to internal department that provided feedback to her saying that I agreed to a deal that uses out of bundle option.Can vodacom please listen to my purchase record and also share with me so that I can hear where I have agreed to this option whereas now their feedback contradicts with my purchase request.