I am Never taking out a Contract with MTN

I signed a 36 month contract with MTN on the 19/11/2015. In August 2018, I checked with them on when and what I need to do when cancelling. I phoned on the said date(20/11/2018) in the morning, I was told they are offline and I should phone back later. I phoned again later, spoke to Siphokuhle Ngubane who said the cancellation department is closed and I should phone the next day.

The next day , 20/11/2018 I phoned and managed to get the contract cancelled (after being “adviced “ not to cancel rather take another contract/ OR wait for Black Friday specials)!! Wait ... Now here comes the Nightmare... MTN wants me to also pay for the month of December, even though my contract has ended on the 19/11/2018. They are billing me to pay in January!!!This is ****************!! To crown it all the lady on the other end , Nomfundo Khuzwayo keeps telling me about my 24 month contract, I had to correct her .. I asked to speak to a supervisor or manager because this cannot be right. I’ve NEVER defaulted on my debit order. I am still waiting for the call from the supervisor.. MTN Fix this ...