Cancelled package still debited

My wife had a contract that she cancelled in February 2015. In spite of this a debit order for R 199 went through on 31 July 2015. I phoned and spoke to Denzer who promised to put in a \double cancellation"and confirm this with me via email. I have not received a confirmation email ....<br> <br> I want the R 199 refunded and be sure that we don't sit with the same problem a year from now. """