CellC Get More Cancelled but still taking my money

I have been trying to cancel my Cell C get more since 06 May 2015 and I am still being billed for the service. I've logged many complaints regarding this and I've spoken to many different Cell C representatives and I have been assured that my Get more has been cancelled, and yet, I'm still being debited. I haven't been using the service at all, so I'm paying for nothing. I have now asked for a refund because I can't afford to be paying money for nothing and this is highly *********. I have not heard from anyone at Cell C since requesting my refund. I will keep trying, and will definitely NOT be renewing my contract with Cell C.