I paid to cancel a contract in November

I paid to cancel a contract in November. The end of the month vodacom still hadn't canceled but took it off my monthly bill. So I paid what they said I should. After that they then canceled the contract after me telling them to not cancel any longer. Since then they have been promising to rectify my account. They keep telling me to be patient it's almost more than 3 months and I must be patient. Vodacom needs to sort my account out and rectify it immediately