Cancellation fees double debited! going to starve!

I cancelled one of my cell phone contracts with Cell C.<br> I did an EFT on 22 June 2015 for R3660.00 and unfortunately i was R6.00 short.<br> When I phoned back 48hours later to confirm the money had cleared into Cell C's account I was notified that they had received the amount but it was R6.00 short.<br> I apologized and I asked if on the following month when they debit my monthly premium for my active contract if they could add the R6.00 that was outstanding.<br> The lady said no problem we will do that mam.<br> This month I got debitted the R3666.00 again!<br> My account went straight into the rears as I did not account for that amount to be debitted.<br> When I phoned Cell C to rectify the problem I was put on hold and transferred to 3 different departments before a consultant told me that he will log a fault with the refund department and they would contact me within 2 business days to try and sort out the problem.<br> So it will take 2 business days to phone me and from past experience I know it will take an additional 14 business days before the money is back in my account.<br> What am I supposed to do for over two weeks with no money and a negative bank balance?<br> If I'm backlisted then what?<br> They don't care!