Vodacom cancellations sucks

I have been trying to cancel one of my contracts for the last 3 months. After phoning them numerous times, and even had a consultant at Heidelberg Vodacom phoning them, I went into the Vodacom store today to make sure that the contract was cancelled. And guess what. It was not cancelled again. I must now proof to them what dates, times and duration I was on the phone with them before they will assist me. They are pathetic