Unacceptable service and given the runaround

My data package has come to an end which I requested to be cancelled. I then received an sms stating that the data package has been converted. I called Vodacom about 4 times whereby they confirmed that the data package has been cancelled but the month has gone and now I am in the new month and the data is still showing in my profile and part of my billing. I have sent two emails whereby my emails have come back with a response that Tobi the robot will be supporting - I have reached out to Tobi before and Tobi wasn’t able to assist. I am beside myself as I am unable to sort out this matter. I would appreciate it if Vodacom could please call me - This is becoming unacceptable that I am not able to sort this out and is taking way too much of my time that should’ve been a simple matter to resolve.