Debit Order on Cancelled contract

Please note that I have opted not to renew my contract, I called in December 2015 to inform you that I won't be renewing and I was told to phone back on the 7th of January 2016 to which I did.<br> A debit order of R509.00 was debited on the 20th of January 2016 which I have assumed to be the last and final debit order for this contract. To my surprise an amount of R295. 00 was debited again on the 20th of February 2016 and I was told it is for the Data, SMS's and airtime loaded in January, fair enough but then another R295.00 was debited from my account yesterday 22 March 2016 and I asked what was that for, the answer: we only cancelled your contract on the 23rd of March 2016.<br> Why was my contract cancelled in February if the call was made in December and again in January to make sure that all is cancelled in time?<br> Can I please ask that you refund my R295 as I really don't see the purpose of you debiting my account for no service. Please cancel all the future planned debit order in my account and that you please not scheduling them ASAP. Please confirm when you will refund yesterday's debit order, I have outstanding debit orders that I was planning to