Vodacom South Africa contract cancellations

I cancelled a Vodacom South Africa data contract early October 2021. I have since been invoiced twice for the same contract for November and December. The contract was due for renewal and past the initial contract period of 24 months. I spend 90 minutes with 4 different people in 4 departments on the telephone and the issue has still not been resolved. I every time had to go through the same verification process and had to repeat the same explanation. The last person I spoke to confirmed that he can see that the contract has been cancelled and cannot understand why I am still charged. He promised to investigate the matter and revert. Let's what happens. One lady went as far as telling me that she can resolve my problem by sending me a free phone if I sign up for another 24 months contract, otherwise she cannot assist me. I wonder what the South African Consumer Protection ICASA will say about that. I asked for a Vodacom e-mail address or contact details where Incan lodge a complaint. I was told that there is no such department in Vodacom South Africa.