Terrible service - no one knows what they are doing.

Terrible service. According to Vodacom my account is in arears, but NO ONE can tell me why. I've been on the phone with them for more than an hour. I eventually put the phone down. I've spoken to someone else and the same story. Is there anyone in Vodacom, who can help me????? Everyday I get a call from the number "3" and they put the phone down in my ear. Insurance was added, I don't need it and for some or other reason, my account is still in arears with R600.00. I phone d in about 3 or 4 weeks ago and the lady on the phone told me, everything is fine and the account will be cleared, I only need to pay R660.00 or something. WHY DO I ALSO HAVE AN ISSUE WITH THIS COMPANY!!!!!????? Today I spoke to Zakithi, Thusu and Sbonglie. Cancel this contract and I will NOT pay anything in, but I can't carry on like this anymore. I would rather go to another company and not have half of the problems I have with Vodacom