A pain to cancel Vodacom contract!!

I have been on an extended data contract with Vodacom since 2022 and have recently been trying to revert to prepaid to no avail.It would seem their cancelation department is non-exist. When you call the upgrade department , your call is picked up almost immediately which is quite the opposite when it comes to the cancelation dept. Why would an entity as big as Vodacom make it so difficult for consumers to exercise their rights?.How would this this experience motivate me to take any future contracts with Vodacom?.