Vodacom makes it IMPOSSIBLE to cancel a contract!

My Vodacom contract ends on 4 May. I have been trying to cancel it for four consequetive days now. 1. The TygerValley Vodacom shop says I have to cancel it telephonically. I cannot cancel it with them. 2. I phoned, more than 10x, the number they gave me. Followed the prompts for cancellation, but only received smses stating that I can upgrade! The smses say that the request for a cancellation isn’t valid before I receive a confirmation email or sms. 3. FOUR days, more than 10 requests from my side - NO email or sms or email confirming contract cancellation! 4. I emailed Vodacom customer care. They asked detailed questions which I responded to, only to receive an email saying they cannot cancel the contract, I have to phone cancellations!!! 5. Anybody, please assist. I want to cancel my contract and Vodacom definitely does not want to assist me to do so. 6. Vodacom makes contract cancellation IMPOSSIBLE!!!