Credit Limit at their Discretion

<p>I purchased a wifi router with vodacom on an open line contract. I specifically called to set a credit limit of R50 , meaning that should i utilise all data for the month the router should stop working. I receive bills that are in the thousands stating that i have used data over my credit limit. </p> <p>Correct me if i am wrong but is the point of a credit limit not to cap expenditure to a certain point. </p> <p>When i called to query the bills i am given excuses that it is possible to spend over credit limit without the service provider informing the user. the disputes that i raised are never resolved and i keep on paying extra for bogus data. This is very disappointing from the largest network provider in the country </p>