Vodacom contract extended without my approval

I renewed my contract with Vodacom in April 2016, mainly so I can be acquire a new handset. I have paid my last installment for the handset at the end of March 2020 On the 22 April 2020, I spoke to Lerato via telephone at Vodacom customer care to downgrade me from Red package 180 minutes airtime and 2 gig of data, reason being that the minutes allocation was too much for my needs; a waste of money from my side. And also that my current contract is expiring and I have no intention of getting a new handset soon as mine is still in good condition. I requested advise on which lower package to downgrade to, of which Lerato advised the 150 minutes airtime and 4 gigs data. She corrected my “downgrade” vocabulary and replaced it with migration. She further mentioned about a penalty fee of R500 which will be debited from my account at end of March 2020, to which I agreed. To my astonishment, this conversation was interpreted as me entering into a new contract with Vodacom which I did not ask for. On ***0, I called to inquire about further downgrading my package as I now have unlimited data access at home and will no longer be needing 4 gig data as per my discussion with Lerato on the ***0. I only need data for when I am up and about to allow me access to my messages and applications when I’m not home. Lungelwa advised on a R199 package and was surprised that Katekani could not assist me. I could not be in the phone any longer as I had a meeting to go to. She promised to call me back at 1130 after my meeting , but this promise was never fulfilled. Today, when calling Vodacom customer care centre, I was informed that my contract was renewed and will expire on the ***1. This is news to me as I don’t recall ever requesting that my contract be renewed, I only requested a downgrade, which was interpreted as renewal of my contract. Nomthandaso and Anette were both adamant that I have renewed my contract, and as result, the contract cannot be cancelled Without any resolution in sight, I asked for my number to be converted to a pay-as—you- go, this in view that I no longer owe for my handset. This was also denied I requested that I speak to the team leader or manager, and this was further denied by Anette stating that none of them were on duty yet because of COVID-19. When pushed, she reluctantly promised that either Kabelo, Phindi, Maria and someone else will call me back when they are in the office after 10:00, again nothing has materialised. After mulling over this dilemma, I can now recall that the same thing happened during 2015 when the very Lerato extended my contract without my permission. Kabelo failed to resolve my matter; and after a tantrum in the store, I was assisted by a lady of Coloured descent; and I believe she is still employed by Vodacom as per Annette. Please assist