Vodacom billing me R1500 but they can't provide a invoice or tell me for what

<p>I called numerous times during the month of june and july to check my data balance with the call centre.Used *111# and tried to use there smartphone app and their website to enquire</p> <p>what my balance is at, only to be told their systems is offline. I was now billed R1500</p> <p>and their systems is offline agian.They didn't</p> <p>send me a invoice or anything but yet i get billed. So in short i was uable to view my usage,</p> <p>so i could not monitor the amount my account would be billed for</p>