NOT DEBITING ACCOUNT

I have been a Vodacom customer since 1999, never had any issues till now!! Been told my account is in arrears, but the debit was not done from Vodacom's side and now am being harassed to pay the amount but have been asking and still waiting for an answer since the 02 April 2016 on why the debit was never done. My line was blocked without notification, have phoned again to Vodacom to unblock my line and to have the debit order redone, now am still being told my account is arrears with the automated phone calls which are virtually about 6 times a day to rectify my account but now have to wait 3 days for the debit to go through from Vodacom's side and have to deal with the automated calls for the next 3 days this all due to Vodacom's mess-up!! Sad to say this has been the worst experience I have had with company and will not renew any of my contracts with Vodacom again after they are due.