Upgrade Incompetence - Consumer Complaint for Vodacom - Head Office

I took out a contract on 6 September 2017 for a Samsung Galaxy S8, the offer included a Samsung J5 Prime as an added bonus for free. On 2 September 2019, my 24 month contract has been honored in full. There was no arrears, no outstanding balance due on the headsets. I called 0821958 and spoke to Tembiso, we did an upgrade where I opted for a Samsung A50 and we agreed that I would be charged R419 per month as of 1 October 2019 (Ref:1-34399991228543). This morning, 30th September 2019, I tried to make a call and I had zero airtime, zero sms, zero data. I called Vodacom and this is when I found out that despite repeatedly saying to Tembiso that I didn't want any surprises, I found out today that although I have a reference number for the cancellation of the J5 Prime and the S8, I am still being charged for phones which have not only been cancelled, paid for in full and are no longer being used but I spent almost 1 hour on the phone being bounced around from one department to the other, customer service, or disservice, which is more apt, upgrades department, accounts/billing, then back to upgrades again, each person more incompetent than the next, each time I got transferred I had to AGAIN regurgitate the same information, ID, bank details, postal code, date of debit, etc... When I asked to speak to a manager I was told that they first needed to know why and then after much debate was told that I couldn't speak to a manager/team leader because they were all in a meeting. It was 9am on a Monday morning! WTF!!! Why are ALL your managers in a fucking meeting!!! I was then told that they would communicate with back office so that I would be charged the correct amount as from November - great fucking use that will do me when you've charged me more than double the agreed amount already!!! R939, instead of R419!!! BEYOND INCOMEPTENCE!!!