No Response

I have emailed Vodacom Customer Care now numerous times since 13 April 2015 to stop my debit order for my account. I have as of yet not received any reply from them. I have 4 automatic response reference numbers but nothing else. I have called the accounts department a thousand times, being on the phone for hours already and still nothing! If I hear that song they play while your waiting for an operator to become available I will scream!! Vodacom is quick to sell you something but as soon as you have a problem they don't respond! Useless company!!