Data data data, soft locked credit limit exceeded

My problem sound like that of many other clients. I keep on having to buy additional data. This has started now during the month of August. I paid over R5000 last week and again R2000 and within a few hours my account has been locked. Sorry, you need to urgently investigate and refund. I think you will realize there is something wrong if you read all the reports. And the standard reply from Vodacom staff is that \your system is running upgrades"?? Sorry"