Call limit exceeded

<p> </p> <p>I have a 3gigs data 169pm contract, and I have set a limit of R50. In October the limit was severely exceed without the line being cut, and have received a bill of R1400. <br />On query at the call centre, I was told that the limit is not a guarantee and it can be ineffective at any given time. I'm not satisfied with this explanation as I believe if vodacom provides a certain service then it should meet the standard of that service and not change as it suits vodacom. <br />I would like for my account to be reviewed for the October month and be given an explanation of what happened during the month of October.</p> <p> <br /> </p>