Cancellation of contract

I have contacted vodacom cancellation department from the 27July 2020 to cancel a cell number that I did use from 2018. Spoke various consultants they promised me it will sorted and to date 13 October 2020 still note. One consultant even told me that I'm in arrears and cut the call. I'm a vodacom client since 1999 and have a few contracts , to be like this now is not right. I'm considering to move out of vodacom. Thanks Sathish