MTN refuse to cancel contract

I had a contract *** which expired on the October 2015. I called on the 10/10/2015 to cancel and inform them that I'm not renewing. On the 1/1/2016 an amount of R1846.73 was deducted from my bank account. I then called their call centre and spoke to Julian who told me the contract was not cancelled and therefore I owed them. She said they tried calling me on the 1st of November and my phone was on voicemail and for that reason they couldn't cancel my contract. I mean really why should that be my problem because I gave them notice to cancel on the 10/10/2015. Why should I pay for an expired contract because the reason they can't get hold of me is I'm not using that number. I then emailed their complaints department reference ***. Please somebody help me.<br> <br> Regards<br> Sello Raphadu<br> ***