Disappointing support

I phoned Vodacom in December 2020 wanting to cancel my contract, i was told it is too early and should wait for closer to my contract completion date, which is 04/02/2021. I phoned them on the 03/02/2021 where i spoke to a lady and said i would like to cancel my contract, she tried changing my mind with a good offer, but i declined it and she said she will put it through for cancellations. On the 18th of Feb another sales lady phoned me and offered me a upgrade of a 250mb contract with a 50gb anytime data contract for R160, i thought yes that's a great deal and I'm happy with that, so i accepted it. The next day i got a phone call from her assuring me she will do the application quick and by end of the month it will be all fine. End of the month came and she loaded the 50gb on top of my current contract and i paid extra for that and my line was never upgraded. Since then, i Phoned and spoke to a Norman on the 15/03/2021 and a Baxolile on the 29/03/2021 and a enquiry (ref no: ***) was opened to see if i did want to cancel and that i will get a refund and still, my contract has not been cancelled and all that is said, they will escalate it. Since then I've spoken to someone on the 31/03/2021 where i was told my contract will be cancelled within 24 to 48 hours and put on prepaid. I spoke to someone on the 6/04/2021 and again was told he will escalate it and my contract will be cancelled within 24 to 48 hours. After being with vodacom for 14 years, i think its now time to cancel and motivate other people i know to get rid of this poor service you get.