Vodacom, cancel my contract.

The history is horrible. I will be wasting time going into it. What i am struggling to do is to cancel my contract with vodacom. They have blocked my number because "they picked up too many calls from my number and suspect *****". In their message they directing to a BOT, which tells me it is not equipped to deal with cancellations. I am frustrated. Why is it easy to take a contract but when it comes to the end you are forced to upgrade or stay on the old contract without original benefits . Agents refuse to escalate issues and they claim they are not allowed to do that. They read scripts and they not flexible. I want out Vodacom. Kagiso