Can easily upgrade but not cancel

Good day, I have a total of 5 contracts with Vodacom, in December 2020 I requested 2 number to be cancelled which was out of contract and 1 to be upgraded. The consultant on the line confirmed the cancellations and the upgrade. The upgrade phone was delivered in December and all was well, only to find out that they have not cancelled the other 2 contracts and we have been pay for those contracts for 5 extra months. I am livid. My wife tried to be civil and call to get this sorted out, she has all the details that they would require and they don't want to help, I work with customers face 2 face during the day so I am unable to sit on a phone call for hours and or be called to get this sorted. This is very poor service, 1 of my other contract has reached the end of it contract as well, so now its 3 contracts that needs to be cancelled. The saddest part is when the agent phoned for the upgrade, we advised him of this and that we want to cancel the other contract as well and was advised that someone will contact us. Still nothing happened.