Expensive fault on my bill and assistance.

I have a contract that comes with 2GB of data. As soon as this data is done, I buy a data bundle. In march I've bought 2x 2GB of extra data bundles at R500 in total. I've received confirmation smsses that the bundles were activated and also got notified when they ran out. Then I've got a bill with extra R2000 (!) charged for data, and no data bundles listed on my bill at all. <br> <br> I've went to two stores, they admitted that there is something wrong and said they can't access my account, I need to contact Vodacom trough their website. I've sent an email 5 days ago, no response. Then I tried the chatroom, they gave me a number to call. I called them yesterday morning, waited on hold for 30 min, only for the operator to tell me that \her system is down\" and cannot help me. She took my number and promised to call me back. Haven't heard anything yet. <br> <br> I've also looked at my previous bills and I've found that this has been has been going on for a couple of months that while I've purchased data bundles, I've been billed out of bundle, adding up to thousands of rands. I expect this issue to be resolved and refunded, but after trying every mode of communication I've received no assistance. "