Huge struggle to cancel Vodacom contract

I literally had to beg, almost go down on my knees to get a Vodacom agent at its cancellation department *** to cancel my contract today which comes to an end after three years on 29 April 2025. This was after telling him I have been struggling for three months to cancel it. I cannot understand why the customer service agent felt the need to explain themselves repeatedly, again and again, while trying to sell me a new contract in various forms and advising me to wait until 15 April to try and cancel it. Apparently this will enable Vodacom to still sign me up for a new contract which would be 'impossible' if I cancelled to day, which was the reason for my call. I can only suspect that this is a generational attitude, the insistence on having the last word regarding why he was trying to sell me Vodacom products, and explaining on and on, while I just begged him to please, please, please just cancel the contract.