Vodacom Cancellations

I have always been a loyal customer of Vodacom. About two to three months ago I called the vodacom cancellation line to cancel two of my contracts that were due to expire. Living costs and the state of affairs has forced me to down scale and try save wherever possible. Although Vodacom has always been a bit pricey for me it's been a convenience for me to support them and keep them as my service provider. After calling on this fateful day I received two messages saying my "quotations" has been processed. After this it was clear to me my contracts were yet again upgraded and extended without my consent. I called them back telling them this, they said they wil sort it. I received a call back, they apologised and said the contracts are now cancelled. They were not. So i left it as it is. Today I called again to cancel another one which will expire the 1st of August. And yet again i received the same message. So does this mean my contract was upgraded again without my consent? What is going on? Why does it take so long to cancel the contracts and why is it always a issue?