Wrongful billing

<p>I am currently on a month to month contract, and it doesn't look like I'll be renewing if this query cannot get resolved.</p> <p> </p> <p>I received an sms that my bundle was depleted 3 days ago, yesterday I receive an sms saying that my bill is now R1500! how is that possible? </p> <p> </p> <p>I then purchased a 2GB bundle yesterday and it is already finished this morning, and I hardly used my phone!</p> <p> </p> <p>I have been a customer for years, but this is disappointing Vodacom.</p> <p> </p>