Miscalculated Cancellation Fee

Hi<br> <br> I went to gym company on 16/03/2016 to cancel my membership. I was told that I have to pay R1074 of which I did on the very same day while in their offices. Shortly after the payment I was informed by Nandi that my cancelation fee was miscalculated and that I had to pay an extra R298 which do not have. The debit order will still go off this month for 199.<br> <br> I am only willing to pay R1074 and want my membership to be cancelled. I do not want the membership any more and would not accept any additional feed