Vodacom unwilling to cancel contracts to exploit users

Vodacom REFUSES to cancel my contract now for end of August 2023. I have to wait until there is exactly 30 days left of my contract before I can cancel without any penalties. If I happen to forget and call them with 29 days left on my contract they will not cancel it, as per the agent. They will place me on a month to month and I have to wait another month to cancel it. My contract has been with Vodacom for more than 15 years and they are STILL providing **** service.