********** upgrade

I called vodacom cancellation dept on the 28 November 2019 to convert my son's number to prepaid as im the account holder of the contract. Only to find out that the contract was upgraded to a n airtime contract for another 24 months on the 8 November 2019 while my son made it clear to the consultant that he doesn't want to upgrade . I was referred to the vodacom rewarding dept yo have the upgrading reversed. I called the rewarding dept and was told that the upgrading was reversed and they gave me this reference number 38876 and the consultant that i spoke to was NICOLE. she also advised that i can call cancellation dept after 3days to convert my son's number to prepaid only to be told again by cancellation consultant that the upgrading was never reversed he will log a call for someone fromback office to call me within an hour that was on Monday and today its Friday still waiting for that call. I need that contract to be cancelled and that number to be converted to prepaid as Vodacom is busy hiring *****s to rob us.