Contract cancellation

I have been a vodacom customer since 2014 and have remained a loyal customer regardless of how bad the service has got over the years. I had 2 contracts that were ending this year one in October and the other one in December, from the moment I called their cancellation number to have them cancel the contracts as I had no intention of upgrading it's been one issue after another. Firstly, the consultant upgraded my contract without my permission had to call more than 4 times to have them reverse the upgrade. I have been calling since September to have them cancel my data contract which ended in October which to this day hasn't been cancelled, every time I call I'm promised the issue will be sorted in 48 hours until I call again just to hear the same nonsense. I am frustrated because I'm being made to pay for a contract I don't want anymore. I will never take a contract with vodacom ever again in my life. Since lockdown the data doesn't even last 2 weeks while their network isn't even connecting