Vodacom lies about contract date.

I got a call from Vodacom online sales on Monday 8 March. The lady I spoke to said that my databundle is expiring and that I had to upgrade. I told her I was under the expression that my contract only expire the second half of the year. She said I was mistaken. I then agreed to an update reluctantly. When I later the evening checked the dates I keep on record for all my Vodacom contracts I saw that this contract only expires on 28 August 2021. The next morning I phoned and asked for the upgrade to be canceled. The person I spoke to said it wil be canceled but now almost three days later it has not been done. I think it is ********* for Vodacom to get people to upgrade early by lying about contract dates.