Contract not cancelled

My son had a contract with you that ended at the end if September.However you still deducted a premium(and this time higher than the normal R199)in October. I phoned the club and spoke to a manager(can't remember his name but I am sure you can trace my call)who said that it was supposed to stop at the end of September(because he is a scholar) and that he will sort it for me.Low and behold,this month you deducted another premium! Why isn't this sorted now? Who will be able to sort this out please?