contact cancelled but still being billed

Its been 6months since I first cancelled my contract and I am still being billed to this day. My first attempt to cancel this contract was in January 2015 in klerksdorp tk my suprise the debit order still went through in March. I went into to one of their stores in alberton city to query this and I was told there is no record of cancellation on my account. So I submitted a new cancellation request on that day in March 2015. Fro that pojnt going forward I have been trying to make a follow up. The employees keep sending me from pillar to post. If its not Franscinah, its du toit, if not du toit its the callcentre and then Melisa Hamburg. By the way Melisa, I am still waiting for your respknse k the email I sent last week. My case number is ***8 its an 8ta contract. This is not my first incidence with this company, you are too damn unprofessional.