Bis deductions after cancellation since April 2014

On 21 april 2014, I upgraded to get a new phone at the tokai branch of mtn. I had a blackberry at the time and was upgrading to a sony. Before I could get the new phone, the bis had to be cancelled. The service agent removed the sim and did a sim swop to a micro sim for the new phone. I noticed on my statement this month that R59 has been deducted every month since I did the upgrade. I logged a query at mtn tokai ref *** and have not had any feedback. I would like my bank account to be credited with all these deductions and would like an apology. I have been an mtn client for more than 10 years, and have never experienced any problems before. The lady who helped me in the branch this week told me my mtn account will be credited, but I want my bank account credited, this is only fair. Thank you.