Cancellation not effective despite numerous attemp

Good day<br> <br> Sent through all required cancellation documents on 9 December 2015 for cancellation effective 31 January 2016.<br> Forwarded the documents twice requesting a confirmation of cancellation.<br> <br> Just spoke to call centre - cancellation has not been loaded!!<br> <br> Reverse all charges immediately and confirm cancellation sending PROOF of this<br> <br>