Inability to cancel debit order

After being a DSTV customer for many years I finally phoned in and cancelled my subscription to DSTV on 29/06/2015. They e-mailed me verification and asked me to complete a questionnaire which I did not.<br> On 01/07/2015 Multi choice debited my bank account for the R779. I realised that I had cancelled quite late in the month and expected them to credit my bank account with the amount. This did not happen.<br> On 1/10/2015 multi choice again debited my account with R779. I phoned their offices on *** and spoke to a certain Mafu who assured me they would cancel my debit order and refund me the money within 40 days. Again this did not happen. My account was again debited on 01/11/2015 and on 01/12/2015.I went in to the Karen Park offices and spoke to Florence Magago who told me that she would cancel the debit order and ensure that my money was reimbursed to me within 7 working days. Again this has not happened. On phoning today15/12/2015, Florence told me that the system kept rejecting the request for cash back.<br> Should I wait patiently, or ...