Promblems with cancellation of contract

I have a Vodacom contract which expired on 8 January. On 11 January I cancelled the contract and spoke the the call centre agent, Tabita Kazaldi. I did not receive any confirmation that the account was cancelled so I called again on 19 Jan. My call was transferred back to Tabita. I received this Ref No.***. I checked my account status on Tuesday 6 April and spoke to Musa who informed me that Tabita didn't press a button and therefore my account was not cancelled. He also said that he will inform her to do so and apologise to me via email. And that I will be re-imbursed for the amounts which was deducted from my account. Today, 9 April I called in again because I still did not get any confirmation. I spoke to Zanele, who said that the person who was suppose to do it is on leave and tried to explain something about a Durban branch. I rep**** to her that I have no idea what branch is **** what and that it is the fourth time I'm calling with regards to this cancellation. She then hung up on me. I am quite livid for the client service I received from Vodacom