Cancellation Impossible

It is impossible to cancel a Vodacom line despite it being out of contract. They will make changes to the contract without informing you and look for every excuse to keep the line active. This is a formal notification of my intention to hand it over to my legal team to consider this as a legal issue as the contract terms were changed without my consent and the request to cancel has not been honored. My original request of where to serve relevent legal documents has not been responded to.